Steeda Stage 1 Mustang Handling Package - Ultralite Linear GT/V6 (2015-2021)

I have had these on my car for a month now and I am glad I went with the Ultralite Linear springs they are nice and stiff perfect for what I am looking to do with the car. The car feels more planted while in turns, less body roll, and less nose dive when applying the brakes.

First impressions, car is handling very good on michigan roads! I cannot go full out performance driving because I did paint my brake calipers as well, ended up being a little short on brake fluid after bleeding all of the air out of the lines, anyways! Overall, a great compliment to the performance package, I am very happy that they maintained a linear rate instead of the progressive rates from others. Went over a few super bumpy horrible gravel filled roads, car actually feels more comfortable for some strange and weird reason. Gave it a little gas on first gear and the car does not squat nearly as much and it does not nose dive nearly as much, swinging the steering wheel back and forth and the car does not act like its twerking anymore so that is awesome. I also installed the steeda subframe bushings as well, so maybe the two were a potent combo! Rear subframe braces are on the way so I'll give you a full Review of everything once they are all on and the car had an alignment, go pro video to come! Also, a teaser of the brakes I did myself

First off, thanks to David at Steeda for his advice and help on this purchase! I ordered on a Wednesday night and they arrived on Saturday afternoon with the regular shipping option. (I'm in Texas, for reference.) I decided to wait a little while till I've had time to drive the car and really shake it down a bit before giving honeymoon impressions. First off, I think the drop ends up being perfect with my wheel/tire setup. I went with the 1.25F/1R option, and with 305/35/19R, 275/35/19 PSS...there's not a ton of room left there, but even under hard driving, I've not seen any evidence of rubbing. Install was fairly straight forward. Done in my garage with jacks/jack stands, taking our time, and with a frozen on rotor (weird), it ended up being about a 3 hour job. Dropping the rear subframe helps immensely to free up getting the rear springs in. Steeda doesn't have anything on the instructions regarding cutting the bump stops, so we didn't...but after reading others recommend it, may go back in and do that at some point out of sheer anal retentiveness, as I don't feel any negative driving/handling characteristics with them left stock, as of now. As for the ride quality - they're linear, so there's a certain amount of tight response they induce that's simply not there with stock springs. (I've got the Performance Pack, for reference.). It definitely makes the car more snappy, more planted to the road, and much more composed around turns. Squat/Roll is greatly reduced, up to roughly .9G, which is the highest I've gotten it since install. This is my daily, too, and there's nothing that I would consider uncomfortable or off putting about the feel of the springs, whatsoever. I do think a nice set of upgraded shocks would be a good idea, but haven't seen options I've find of yet to replace with, and might end up skipping entirely straight to Coilovers. But, these springs are a great upgrade and have definitely reduced my want/urgency for COs exponentially. It made the car feel that much more a true sports car, which I suppose I expected off the lot, originally. Steeda came in and offered a fantastic, affordable, quality product to remedy Ford's shortcoming. And they make the car look that much better, too. Win-Win! Thanks again, Steeda!

The Steeda Linears are awesome, my car handles like a dream compared to a stock PP.

A couple of months ago, I started looking into overhauling the suspension of my 2015 GT PP. Up to that point, I had put about 7000 miles on my Mustang which allowed me to get a good sense of the issues with the IRS and overall suspension in stock form. Specifically, I wanted to stiffen up the entire rear end and eliminate the dreaded wheel hop while keeping NVH as close to the stock levels as possible. I also decided to replace the stock PP springs and sway bars in order to improve the overall handing, reduce body roll/brake dive and get rid of the bouncy ride. After going through a ton of feedback on the various solutions from the aftermarket (a lot of which came from fellow mustang6g members), I decided to go with Steeda. Below are the parts I chose to go with. Differential Bushings (Red/Street) Subframe Alignment Kit Subframe Bushing Support Vertical Links Rear Toe Link Subframe Suport Braces Linear Sport Springs Front and Rear Sway Bars and Billet Sway Bar Mounts Bumpsteer Kit I already had the Extreme G-Trak Brace installed. Now to the most important part...the results. The handling of the car is on a whole different level after the suspension upgrades. Minimal pitch and roll during braking, turns and transitions. Overall, the entire car is very tight with much better turn in. As expected, the biggest improvement is the rear end. The power delivery through the IRS is fantastic. The wheel hop on my car is 100% eliminated. The rear tires feel as if they are glued to the ground. Coming out of corners, I am able to get on the throttle earlier and more aggressively without any drama. In terms of NVH, I hear some gear whine in 6th gear under minimal throttle between 75 and 80mph (windows closed/stereo off) as a result of the differential bushing inserts. Apart from that, I can't tell a difference compared to stock. Even the ride quality feels great. My fiance couldn't tell that anything had been done to the car. Overall, I am very happy with the results. Props to Steeda for the excellent work they have done. In the near future, I am looking forward to adding a quality set of performance shocks/struts and hitting the road course.

Overall, I really like the handling. It is a little bumpy but that was to be expected with the linear rate springs and being a little lower than the Sport springs. It's a major upgrade over the stock Performance Package ride in terms of steering feel and nose dive/squat. It may not have the ride quality of a crazy expensive JRZ coilover kit but that's obvious. You're going with $300 springs, not a $3k coilovers. If I could change one thing it would be that my car looks lower in the rear than it does in the front and it bothers the hell out of me. Granted, part of that has to do with the fact that I put aftermarket wheels and tires and went with the TireRack rep's recommendation and the front tires should have been one step up in the profile size so that it was closer in size to the overall diameter of the rear. But it still seems that there would be more wheel gap in front even if TireRack didn't steer me wrong there. The nice thing is that tires wear out and I'll get a chance to try a different size before too long that should help reduce the wheel gap in front - especially if I put this new suspension to good use! Aside from that, very happy with this purchase.