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Mustang Performance Parts

SCT X4 Mustang Tuner w/ Steeda Lifetime Certified Tunes (96-16)

Our Price $399.95
Market Price $459.95  
You save $60.00 (13%)
400 points

Manufacturer:  SCT Tuning

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  • Product Description
  • Installation Info
  • Mustang Fitment

*Over 20+ hp increase with tuning alone*

SCT's X4 tuning device is the latest evolution of the X series of tuning devices from SCT. SCT's X4 features great improvements in design and use. This unit is a smaller, more compact device than the X3 it replaces.

The X4 features a larger, brighter, easy to read color screen with auto dim and user adjustable portrait and landscape modes. The device holds up to 10 custom tunes which can be supplied by SCT custom tuning dealers and also includes pre-loaded strategy files from SCT.

Now with built in Wifi, the device can be connected to any wireless network and will allow you to install any software updates released by SCT right through the device without a PC.

In addition, the X4 offers improved datalogging capabilities right through the device or when used in conjunction with a laptop and SCT's Live Link software.

Note: For custom tuning applications please provide the vehicles 4 digit processor code with your order.

Note: Purchase of this item enrolls you in the Lifetime Tunes Program. To read more about the Lifetime Tunes Program, Click Here.

Product Benefits

  • Larger adjustable screen with landscape and portrait modes
  • Holds up to 10 custom tunes
  • On screen datalogging and monitoring
  • Wireless connectivity

Warning: Not approved for sale in California or states that require a California E.O. #. This part has been designed and is intended for off-road application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations.

Note: Federal and several state and provincial laws prohibit the removal, modification or rendering inoperative of any part that affects emissions or safety on motor vehicles used on public streets or highways. Steeda Autosports assumes no liability for any violations arising out of any federal, state or provincial emissions or safety requirements on motor vehicles arising out of the customer’s modifications and/or use of Steeda products. It is the responsibility of the customer to determine if their modified vehicle complies with applicable laws.

This limited warranty is the only express warranty applicable to Steeda Autosports products. Other rights may arise or vary from state to state in the United States. Steeda is not responsible for any time for which you may lose the use of your vehicle, any inconvenience you might be caused, the loss of your transportation or any part thereof, or any other incidental or consequential damages you may have.

Time to Install
About 15 Minutes
Level of Difficulty
Tools Needed
No Tools
Model Year(s)
2016 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996

Bullitt Cobra Cobra R Mach 1 GT V6 GT500 Boss

Manual Automatic

Product Reviews

Installed a Bama tune and nothing but problems even with revisions. Steeda Nailed it the first time. More power, better Throttle response, and as far as driveability it drives like stock.

Got the tunes and let me tell you they are worth the wait really brought the car alive I love it.

I was a bit unsure as to how this tuner would really do. I am a believer now! After installing a 93 octane race tune, twin 62mm throttle body, and a "Steeda" CAI....all i can say now is my car is a beast now. I highly recommend this tuner. easy to use, with simple on screen prompts, and more hp and torge, make it more than worth it!

Tuned by Steeda! This thing is an animal! Great tune. Idles very sedately, revs fall through the range freely (better than stock). Love it!

I continue to be impressed by Steeda.

My requests for tune revisions are completed in 24 hours and more importantly, the tunes themselves are the gold standard.

I picked Steeda for it's reputation and I now know that reputation is well deserved.

I hope you take it for the complement it is when I tell you the throttle response and modulation is BMW-like. I have tried other tunes and without fail come back to Steeda because the throttle is perfect.

Awesome tune!!
Way better than Lund Tune .
The car just begs to be driven hard.
Fuel Mileage also improved.
Now time for the Headers and an Intake.

First thing I noticed was the throttle response is crisper... takes less pedal to get the car up to speed. Seems to want to accel with the slightest amount of gas. Midrange torque is increased by the butt meter and not just's noticeable. Feels great and can't wait for the intake to get here and the tune for restrictor removed. I am assuming it will be another good experience yet again.

I installed the tune and put a few driving cycles on it yesterday and am quite pleased. The car seems more eager to rev. It shifts a bit smoother since I am now shifting at a slightly higher RPM as a result. This is a happy by-product I did not see coming.

It does indeed feel more powerful in the low to mid-rpm ranges. It is a nice upgrade. I am most impressed with the tunes ability to retain stock driveability. There is no surging, no lurches from hanging RPMs, and power delivery feels more linear. I was worried about this due to past tuning experiences, but my worries were unfounded.I am not really interested in peak numbers, just how fun the car is to drive, so there probably won't be any dyno testing.

Ordered this tuner from Steeda because of previous experience buying from Steeda and their reputation for solid tunes. Order fulfilled and shipped quickly. Have not been disappointed yet.

I have had Steeda custom tunes in two Coyote Mustangs and most recently my Cobra. Working with them on custom tunes is always a pleasure. Turn around time and service are second to none and the results are astounding.

Each car had great gains in throttle response, horsepower and torque. I always run the 93 octane tunes on my cars and driveability is unaffected. Cruising around or daily driving is just as easy as stock, but step on it and and you have a whole different animal on your hands.

I have trusted Steeda with each car thus far and would not turn to anyone else. Thank you for a great product.