Steeda Autosports’ S550 Road Racer
The suspension innovators at Steeda are close to unveiling the company’s new road racer
By Michael Johnson
September 23, 2016
We recently brought you news of Steeda Autosports’ Scott Boda and his 8-second Fox Mustang. Most aren’t familiar with Steeda’s extensive line of drag racing components, but Scott helped us clear up that misconception. This time around we’re telling you about Steeda’s road racing prowess, and the new car the company is building to showcase its extensive line of handling components for the S550 chassis.
While working with Scott on the write-up of his Fox, he also sent us a few images of S550 road race car Steeda is putting together. This 2015 Mustang GT started out life as Steeda’s product development car. “Now it’s going to be a naturally aspirated road race car,” Scott says.
With any road race car, door bars are imperative to driver safety. When it comes to race are construction, Steeda handles the builds in-house. “The car features all of our suspension components, as well as, some trick prototype parts not yet released to the public,” Scott says.
As mentioned, the 2015 GT started out as a development car. Obviously, that means the car was used to design, test-fit, and research what worked and what didn’t. “We are the innovators as we are the first company with replacement vertical links, IRS subframe bushing supports, toe links, alignment dowels, and IRS support braces,” Scott says. “We also feature ultra-low profile jacking rails that are second to none. We are known in the S550 community as having the highest quality parts for the S550, parts that absolutely eliminate wheel hop,” he adds. When it comes to roll cage in the car, Steeda engineers welded the cage into place, and also painted it to match the car’s exterior.
Once the car is ready to race, Scott tells us the car will be aimed at Touring competition, specifically T1, which is designed for the latest performance cars, including Mustangs. There are different levels of Touring classes aimed at varying levels of performance vehicles. With Steeda’s past racing successes, we’re sure this new car will follow in those marks.
So much for the family car functionality, Steeda’s 2015 GT T1 is pure race. The car’s roll cage takes up most of the rear seat area, and factory creature comforts are long gone in the name of all-out speed.
VALDOSTA, GA – Steeda Autosports, the world’s largest aftermarket manufacturer of Ford performance equipment, has delivered a Steeda Police Pursuit Mustang to the Valdosta Police Department. Equipped with a vast array of Steeda performance and handling upgrades, the Steeda Police Pursuit Mustang provides enhanced handling, acceleration, and durability, all with an increase in fuel economy.
“We are tremendously proud of being able to support our law enforcement professionals with the type of pursuit vehicles that they need to respond to emergency situations,” said Dario Orlando, President of Steeda Autosports. “Our marked Steeda Police Pursuit Mustangs are a bad guy’s worst nightmare. They provide the utility needed for everyday patrol and the performance needed to overtake even the fastest violators while enabling law enforcement to end pursuits quickly and in the shortest distance possible, which translates to increased safety for the public and the officer.”
Background – Speed Matters® is more than just a slogan at Steeda – from ISO 9001:2008 Certified Engineering and Manufacturing to the creation of purpose built Steeda Police Pursuit Vehicles – our strategic intent is to provide patrol officers with vehicles that have lightning quick acceleration and unmatched handling capabilities allowing patrol officers to perform their job in the safest and most expedient manner possible.
Details – The Steeda Police Pursuit Mustang is equipped with Steeda performance parts to the exact specifications of the Valdosta Police Department. Modifications include the following pursuit rated performance enhancements:
With more power and increased efficiency, the Steeda Pursuit Vehicles also provide greatly enhanced durability and are built to take on the rigors of everyday police intercept operations and emergency responses unlike any other competitive products available in the market today.
Availability – Steeda Police Pursuit Vehicles are available to all authorized police and law enforcement agencies.
About Steeda Autosports – Founded in 1988 in Pompano Beach, FL, Steeda Autorsports is the culmination of over 28 continuous years of racing history, product innovation, and continuous automotive refinement driven by a passion for performance and a love of great design. At Steeda, we share the wealth of our motorsport expertise and our ISO 9001:2008 certified processes to bring a completely new level of performance and excitement to the Ford Mustang, F150, Focus, and Fusion vehicles. More information on Steeda Autosports performance parts can be located at www.steeda.com and vehicle specific information can be found on www.steedavehicles.com.
Once again you asked for it and the Team at Steeda delivered!
We designed the Steeda Sound Delete Kit for use with the OEM induction system on the 2015+ GT Mustangs. Lots of customers choose to get rid of the factory sound tube but have no way to plug the 2 holes left as a result of removing it. This simple kit comes with a rubber cap for the intake tube and a plug for the firewall making for a clean removal.
Track-Testing the 2015 Steeda Q650 Mustang at Sebring International Raceway
2015 Steeda Q650 Track Test: This Mustang eats up the track and leaves you plenty of performance for the street.
By Evan J. Smith
When it comes to Mustang performance, power and speed are everything. OK, looks are important too, but massive horsepower, a sharklike grip, and Formula 1-like braking are what enthusiasts crave. For over 25 years, Steeda Autosports has been giving Mustangs catlike reflexes by engineering high-quality performance parts to get them quicker lap times.
Steeda is also known for its package Mustangs. Recently we drove the new 2015 Q650 at the famed Sebring International Raceway. We met up with Steeda Autosports for the 14th Annual Track Guys Performance Driving Event Sebring Sensation, where Steeda’s president, Dario Orlando, tossed us the keys to his latest Pony.
“Our objective with the Q650 and our Q-series of Mustangs is to build a track-ready car that outperforms much more expensive cars for far less money,” said Orlando. “We manufacture and sell our own parts so you can purchase a complete car with the Steeda package installed, or add the parts to your existing Mustang. For the 2015, we first built a mockup of the front and rear suspensions. This allowed us to analyze the suspension arrangement and note the areas of concern as they relate to high performance. We’re looking to satisfy the performance-minded enthusiasts who wants a fast, capable street car that is ready for the track.” I was anxious to attack the limits.
Sebring is a wonderful place to drive a Mustang. It presents a mix of straights and corners—its imperfect concrete surface exposes any driver or mechanical weaknesses. The full course is 3.74 miles of worn-out concrete that blossomed from Hendricks Army Air Field in the 1940s, where B-17 and B-24 crews trained for WWII. While flat, those linked slabs and the joints connecting them create a jarring effect. In addition, many of the braking zones and corners are slathered with tar sealer. The layout and surface make it a challenge to maintain compliance and speed on this historic and fun track.
Straight away we noticed the 2015 Steeda Q650 was more composed than the 2014 Q650. Exiting Turn 17, which leads to the front-straight, we poured the coals to the Vortech V3-blown 5.0 and the Coyote responded with a whoosh of power. We blasted past the start/finish line at 120-plus mph heading towards the difficult Turn 1.
We drove in deep, laid into the Brembo brakes (which were enhanced with Steeda slotted rotors and Carbotech race pads), and downshifted to Fourth gear. Man, those brakes are nice! They modulated nicely and had a firm feel. We killed enough speed to cut in towards the apex, and the Steeda G-Trac suspension kept the Mustang flat and controlled. The front is modified from stock with a Steeda adjustable front sway bar with billet endlinks, progressive-rate sport springs, upper strut mount, Extreme G-Trac brace, and Steeda strut tower brace.
Still in Turn 1, we eased the Mustang towards the inside wall, nipped the apex, and in a continuous motion unwound the wheel to let the Mustang drift out. We were carrying a great deal of speed, but there was no drama, even as we flew over the dips on the corner exit. Power on—aim for Turn 2.
“When we first set the car up it was understeering a touch,” said Orlando. “So we adjusted the sway bars and gave the car to Evan. The Q650 is still new, and we’re always working and testing to make the package better.”
The adjustment was spot on. The Q650 was balanced and neutral-feeling (meaning there was no abundance of understeer or oversteer). Clearly the 2015 S550 chassis works. To be frank, there’s a huge difference in the dynamics between the 2005-2014 S197 Mustangs and the 2015 S550. Amazingly, they both give you that Mustang feel; however, the S550 is refined and composed, but not at all sterile.
Turns 2 through 5 are a series of slower switchback corners that are really fun, especially when you’re on line. We purposely used the raised inside corner curbing in this section, and the Q650 ate ’em up. Exiting Turn 5 we blasted towards the Hotel turn, which is a supertight right-hander. Though the braking zone is straight, there’s a lot of sealer and we were carrying big speed in Fifth gear. We put the brakes to the test and were welcomed with controlled, flat deceleration. At this point we had to remind ourselves that we were driving a Mustang with A/C, stereo, and a multitude of safety and creature comforts. The performance, feel, and sound of the Q650 makes you feel like you’re wheeling a purebred race car.
After only a few laps we noticed three distinct things. First, the Steeda was amazing under braking. Second, it rotated into the corner precisely and with little to no body roll. Finally, its best attribute may be during corner exit, as it stays smooth and controlled over rumble strips that looked like gator teeth.
When you brake, the entire car plants, giving each contact patch more grip. This extra traction lets you turn in more aggressively and carry more speed through the corner. In live-axle Mustangs you can expect the nose to dive and the rear to get jacked up under aggressive braking. This upsets the balance and makes the car nervous. With the Steeda-enhanced IRS, the back was calm and no extra steering input was required.
Speaking of the steering, it’s laser-precise. Ford’s 2015 Mustang suspension combined with Steeda’s improvements lets the Q650 turn sharper with more control—you don’t find yourself making those little inputs to stay on line.
With the Mustang slowed, we picked our point and took a late apex through the Hotel turn (Turn 7) and went power-on through 8 and 9, two sweeping corners that set you up for Turn 10. At 10 we buried the brake, slowed, and dove into the tight right-hander. The Steeda Q650 just follows along. It gives you confidence because it’s predictable and has excellent balance.
Mechanically, Steeda readies the Mustang for action with adjustable toe links, billet aluminum vertical links, Steeda’s S550 IRS subframe bushing support system and alignment kit, and IRS subframe braces. To enhance grip, Steeda treated the 2015 GT to 20-inch ST-R wheels (20×9 front, 20×11 rear) and Nitto NT05 tires (275/35/20 front, 315/35/20 rear).
Turn 11 is an off-camber sweeping left. It’s kind of blind, and we always feel like we’ll fly off the track if we aren’t careful. We breathed the throttle even though we knew we had grip, and we still went faster than we ever had before in a street-legal Mustang.
We like 12 and 13, a kink followed by a hard right that has a wide exit. We exercised patience, turned in late, and put the pedal to the mat really early. We expected the tail to kick out, but it just gripped and off it went. In NASCAR that’s called “forward bite,” and the Steeda has plenty.
Turn 14 is very much like 11, so we were cautious. But in Turn 15 we went all out, diving in late and getting set up for 16 and the long back straight. The sharp gator’s-teeth rumble strips in 15 and 16 were no problem—we hit them full on and rolled the throttle wide open just after diving into 16. We rowed the Tri-Ax shifter into Fifth gear and ran past 140 mph as we approached the treacherous Turn 17, the bumpiest corner on the course. Turn 17 gets the attention of even the most skilled drivers. It links the two biggest straights, and it’s important to be fast if you want a good lap time. The corner and the bumps never seem to end, and you must get back to the gas long before you can see the corner exit. Furthermore, the line exiting aims you straight at the outside retaining wall. Lift? No way. We let the Mustang track all the way out so we could straighten the exit, and that helps build speed.
“We do a lot of slalom and skidpad testing before we ever go to the track,” says Orlando. “Once we feel the package is close, we’ll do road course and sometimes drag testing to dial in the car to our specifications. For instance, with the 2015, there is noticeable movement in the rear bushings, but this is done purposely by Ford to control NVH and to give the Mustang good ride quality. To satisfy the niche market, we engineer parts to eliminate softness and add control for the person who wants a fun car that can perform on track and beat exotic cars that cost way more.”
The Steeda was amazingly fast around Sebring. We enjoyed every moment behind the wheel. Dario Orlando and his team produced a Q650 Mustang that provides a track-car feel in a package that’s nice to drive on the street. Of course, Orlando mentioned he was working on a 700hp calibration, so we think we’ll have to get back to Sebring and bring you another report.
You asked, and we listened. Upon the initial release of our very first lowering spring kit for the S550 Q4 2014, many customers have been asking if/when we would release an ‘extreme’ lowering kit for those that wanted to eliminate wheel gap. The wait is now over!
Our Ultralite Extreme Lowering Springs lower your S550 Mustang approximately 2″ in the front and rear while providing a great ride quality for every day driving or track use. These linear springs have a rate that’s 20% higher than the Performance Pack springs while also weighing in 10% lighter.
Check out the stance on our 2015 Q650 Vortech supercharged Mustang GT:
Springs are the foundation of good handling and ride quality, so start with the best springs for your 2015-2016 Ford S550 Mustang GT, V6 or EcoBoost, built by the company that specializes in vehicle dynamics and your Mustang!
Stangs Storm Sebring International Raceway at the Track Guys Camp Steeda Driving Event
Mustang Track Attack
Evan J. Smith
Team Mustang-360.com celebrated Memorial Day putting horsepower to the ground at Sebring International Raceway at the 15th Annual Camp Steeda, which was put on by Track Guys Performance Driving Events. More than 120 participants ran the full course for two days of fun in the Florida sun at the premier race facility that hosts the popular 12 Hours of Sebring. Track Guys is a real driving school that offers classroom education for new and beginner drivers, and a fair amount of passing is allowed. Participants are broken up into four groups so you are always out there with drivers in your skill and talent level.
We arrived Friday, May 27, and took in the amenities at the Chateau Elan, a racing-themed hotel that is on the property of the track. It is always fun catching up with Mustang owners and taking about modifications, horsepower, and racing. Racers prepped their rides, and we got a close look at everything from race-prepped Fox-body Stangs to a 1993 SVT Cobra and a half-dozen Shelby GT350 Mustangs. Of course, there were also GT500s, Bosses, and tons of GTs. We also saw some nice Shelby GTs, a Bullitt, and a few non-Fords.
We hit the track bright and early Saturday, and after the obligatory drivers meeting we were blasting into Turn 1 with the Steeda EcoBoost Mustang. This Competition Orange Ford was fitted with the G-Trac suspension and upgraded brake pads and was putting just about 400 hp to the ground.
We expected to be eaten alive by the sea of V-8–powered Mustangs and Corvettes in our group, but amazingly we passed everyone in sight. While we didn’t have the power to pull anyone down the straights, we could close the gap under braking and we had big-time momentum in the corners. The nose is ultralight, and planting the tires with late-braking gives you a very high level of grip on initial turn-in. We found ourselves pushing really hard, and the Mustang remained composed and balanced. In just a few laps we passed a Corvette, a GT500, and (we believe) two GT350s. We are sure they had no idea we were only packing four cylinders.
Next up was the refined Q650. This Mustang, with almost 700 rwhp, Hoosier slicks, and big brakes, was an entirely different animal. We went out slow, wanting to get a feel for the car (read: we didn’t want to stuff Steeda’s Mustang into the wall). But after a few laps we ramped up to about 80 percent and were flying. The Q650 is really at home on the track. It has a wonderful balance of power, grip, and handling feel, but most impressive is the control you have. Steeda has truly made it easy for the average driver to get on track with a street car and experience race-car performance. The car is stable under braking and doesn’t so much as wiggle under you when loaded in the corners. You simply brake, turn in, unwind your steering, and roll into the power—no fuss, no muss. Around you, drivers are spotting you in the mirror and pointing you by.
We could exit Turn 16 over 80 mph and reach 145 mph down the back straight, still leaving plenty of room to brake. At the limit, and with a more experienced driver, 150 would be no problem.
Still, performance driving is more about learning to control the car under braking, cornering, and acceleration. And the Steeda suspension enhances the IRS capabilities and lets you get out there and experience reduced body roll, less nose dive under braking, and big grip in the corners and during corner exit. Of course the slicks enhanced performance, but they don’t give the car any additional balance.
Unfortunately we couldn’t spend all of our time driving; we had to get out there to capture the action of all the participants. We walked around the pits and took in the racing from some of the best corners in motorsports. It is always fun watching other drivers’ lines and listening to the variety of engines and exhaust as they blast down the long straights.
We Test the Steeda Mustang Clutch Assist Spring With Great Results
Find Better Feel: We test Steeda’s Mustang clutch assist spring with great results
Evan J. Smith
Sliding the clutch and shifting with lightning speed is one way to get maximum performance from your Mustang. Those who prefer a manual transmission understand the importance of smooth clutch, transmission, and shifter operation. They also value being a direct part of the acceleration process.
While the 2011-present Mustangs offer great styling and amazing acceleration, there are a few shortcomings. One is the clutch pedal. Many owners dislike the overly light feel (especially on 2015 and newer models). Even worse, the pedal can actually stick to the floor during aggressive upshifts.
The light feel comes in part from a helper spring mounted on the clutch pedal, which Ford engineered to assist clutch actuation. “The factory high-rate [clutch assist] spring is what causes such a vague and disconnected clutch pedal feel,” says Glen Vitale of Steeda. “The clutch pedal travels in a circular arc, with the spring assist in the middle of that clutch pedal travel. The middle of that motion compresses the spring initially and then allows it to extend after the first 30 degrees of travel. The combination of a high-rate assist spring and motion of the pedal during engagement causes a nonlinear and sometimes confusing pedal feel.”
Some owners have removed the spring entirely in an effort to find better feel, but this is not the best option. “Mustang owners have found that taking out the stock spring will give them a better-feeling clutch,” Vitale says, “but realistically the clutch becomes far too heavy, especially if your Mustang is daily driven. And most owners fail to realize the prolonged effects of simply taking out the factory spring and not replacing it with something better.
“By negating your factory clutch assist spring you will notice chatter and NVH from your clutch pedal,” says Vitale. “Your clutch pedal will never fully return to stock position without any assist spring, and over time your slave cylinder may begin leaking due to constant pressure on its seals from the clutch pedal not returning to the stock position.”
A quick, easy fix is to install Steeda’s clutch assist spring, which sells for just $9.95 and installs in seconds—well, maybe a minute or two. “Our Steeda Mustang clutch assist spring has only 35 lb/in and replaces the factory 185-lb/in assist spring,” explains Vitale. “Our engineers have honed in on the right amount of spring rate to achieve the perfect clutch pedal feel. Our spring ensures a consistent feel and minimal sag, even after repeated use, plus it is backed by our lifetime warranty.”
Interested to feel the difference, we did a before-and-after test on Steeda’s 2014 supercharged Q650 Mustang. Having driven this very pony to Mustang Week in 2014, we were quite familiar with the vehicle and the clutch. Still, we wanted a refresher, so we hopped in and took the Stang for a spirited drive.
Clutch actuation with the stock helper spring was OK at best. We didn’t experience the clutch-sticking problem, but we did notice the difference in feel as the pedal was depressed and released. I could feel the difference in the pressure required to push the clutch to the floor, and the same thing was felt during release. Essentially the pedal is easy, then slightly stiffer, then easy at the bottom.
We then installed the 35-lb/in Steeda clutch assist spring. There wasn’t a huge difference in the overall pressure required, but it was noticeable. The big change was in the middle of the pedal throw. Pressure was now uniform and consistent. In addition, you could really feel the point of release and when the clutch grabbed.
While the S197 Mustangs do not have a superlight clutch, the same can’t be said for the overly light 2015 and up S550 Mustangs. These models will most certainly benefit from the Steeda spring. Let’s face it: When you’re jamming gears, the last thing you want is an inconsistent clutch pedal. The Steeda clutch assist spring is one item we wouldn’t want to live without.
01. We did the before-and-after clutch spring test on Steeda’s own 2014 Q650 Mustang.
02. Steeda’s clutch spring will work on any 2011-present Mustang, including V-6, EcoBoost, 5.0 GT, Shelby GT350, and GT500.
03. If you’re looking to improve clutch feel and reduce the chance of your clutch pedal sticking to the floor, you’ll want to check out Steeda’s clutch assist spring. It sells for under $10 and installs in seconds.
04-05.The clutch assist spring is located on the right side of the clutch pedal. You’ll need to hold the clutch pedal to the floor to remove the spring. This can be done with a friend helping, or you can use a pry bar like we did.
06-07. Next, use a pair of needle-nose vise grips to compress the spring. This will allow you to pop the spring from the upper mount.
08-09. Steeda offers two different springs (stock is on the left). We chose the middle spring, which you can see with the upper and lower mounts.
10. To reinstall, simply slide the white lower mount over the stud on the clutch pedal and snap the upper mount and pin into the receiving slot on the bracket. Lastly, let the clutch pedal come back to the top and work the pedal to ensure that the spring is seated properly.
POMPANO BEACH, FL – At Steeda, we know you’re out there. You sit up on the wheel a bit more than other drivers, silently counting down from the cross-traffic caution, ready to cut the perfect light when your signal changes. On this morning, while others are merely headed to the office, you are destined to be in the Winner’s Circle!
Which sadly looks a lot like your cubicle.
Face it – your morning commute is a poor substitute for real track time.
Anyone who has driven their car at speed on a race track can tell you what a rush it is. With a bit of professional direction, man and machine become one. New skills are honed over repeated laps. Experience is gained. Confidence grows. You actually become the driver you’ve always believed yourself to be. Only better.
Time for you to level up? Don’t miss Camp Steeda 2016: our 15th annual assault on legendary Sebring International Raceway. Check into the Chateau Elan Hotel Friday, May 27th then meet fellow students, instructors and sponsor reps as we socialize. We’ll then spend Saturday and Sunday bringing you up to speed. Your two-day, go-fast boot camp addresses the tech requirements for your vehicle, ride-along instructions that combines theory with ‘seat of your pants’ experience, and ultimately, you will be cleared for take off to enjoy solo laps. And more solo laps.
Just you, your car and that glorious, twisting ribbon of asphalt. At ever increasing speeds.
You’ve already made the investment in your vehicle – time now to invest in yourself. Learn world-class driving skills from the Steeda Team and TrackGuys, right here in your own back yard. Hot laps at speed in Steeda Vehicles available at the this event to help you decide if any of this is right for you.
Join the automotive faithful at Camp Steeda 2016. Your morning commute will never be the same.
Event Registration: Complete information including dates, times, daily schedule, location, map and more: http://bit.ly/CampSteeda
About Steeda Autosports – Steeda drives the market for Ford Performance. Owners of Ford Mustang, F-150, Focus and Fusion vehicles experience the utmost in performance, handling and style with Steeda. Committed to continuous refinement of automotive part design, Steeda’s passion for performance has fueled nearly 30 years of podium finishes and product development. Steeda engineers components in-house, then manufactures them using ISO 9001:2008 Certified processes. Now available on new, turnkey Steeda Vehicles.
Steeda Autosports Goes Worldwide With Limited-Production Serialized Ford Mustang, F-150, Focus ST & Fusion Vehicles
Steeda to expand globally
Evan J. Smith
With the global launch of the 2015 Ford Mustang, many companies are looking to spread their reach for sales of aftermarket parts and goods. Beginning this month, Steeda Autosports, one of the largest aftermarket manufacturers of Ford performance equipment, is set to launch a Global Product Sales Network. The network will provide dealers worldwide with the ability to sell Steeda Serialized Vehicles, performance parts, and accessories to select Ford and exotic and supercar dealers worldwide.
“This is a tremendous opportunity to take our global network to the next level,” said Dario Orlando, president of Steeda Autosports. “The Steeda Serialized Performance line of vehicles are some of the best and highest-performing vehicles available in the market today.”
Steeda’s street- and track-proven combinations will now be available worldwide. “Speed Matters” is more than just a slogan at Steeda, whether it is the development of ISO 9001:2008 certified engineering and manufacturing or the creation of limited-edition Serialized Steeda Performance vehicles, Steeda provides the vehicles with enhanced performance to meet the needs of the niche automotive marketplace. And now Ford owners worldwide will benefit from this excellence in performance.
“We have a dedicated team of Steeda sales professionals who will aggressively be working with, and certifying, select Ford and exotic/supercar dealers worldwide,” Orlando added. “Steeda plans to grow this network of certified dealers who will share in the same core values that Steeda Autosports has worked to established over the past 28 years. This includes selling an array of vehicles that offer exclusivity, dramatically improved performance, substantial substance, and increased value. Ultimately, we provide a driving experience that’s second to none.”
According to Steeda, each certified dealer will be authorized to service Steeda vehicles under the Steeda three-year/36,000-mile warranty program. For more information about becoming a Steeda dealer in specific market areas, contact Carm Ross at CARM@STEEDA.COM.
Steeda Autosports Releases an All-New Subframe Support System for S550 Mustangs
By Henry De Los Santos
Mustang360 Network Content Director
With the release of the new S550 Mustang, Steeda realized that addressing the IRS system would be a top priority. Being the first production Mustang with an IRS since the 2003-2004 Cobra’s, Steeda knew there would be a great opportunity to capitalize on Ford’s latest piece by giving it the Steeda advantage.
As with any suspension system, deflection is an issue if it’s present. Anytime a piece is moving, twisting or vibrating when it should be stationary is a major problem. One of the areas team Steeda wanted to focus on was the rear IRS subframe.
Steeda’s IRS Subframe Support Brace is built in-house and constructed out of 4130 chrome-moly steel and powder coated silver metal flake, creating a strong component, all the while giving it a great look.
To get a better understanding of Steeda’s IRS Subframe Support System; it ties together three very important points on the S550 chassis. They utilized existing threaded holes in the rocker panel, which is the strongest part of the body; connecting that to the front mounting location of the IRS subframe and to the rear mount of the lower control arm and toe link.
Connecting these three points together not only adds rigidity that was lacking in the rear, but also provides more control of the entire vehicle. What helps Steeda’s kit stand out is that their setup supports that bracket while connecting to two additional locations, giving it added rigidity.
One of the best features of this this kit is that it uses the existing holes in the chassis, making it a simple bolt-on item. This also limits any undesirable modifications to the chassis and adds no NVH whatsoever.