5.0L ROUSH Phase 1 Supercharger Mustang 575HP Upgrade Kit

Free Shipping Our Price: $449.99 (USD) *
Part #: 421387
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Live in Canada? Place your order at 800-597-6874

Product Features

  • 575 Horsepower and 505 lb-ft of torque (upgrade to previous 525hp or 540hp kits/vehicles)
  • NOW 50 States emission legal for 2011-2014 / CARB E.O.# D-418-23
  • Available for manual and automatic transmission
  • 85mm S/C Pulley
  • 2085mm FEAD Belt
  • To be downloaded using the ROUSH Diagnostic Tool (RDT) software.
  • Works with 2011-2014 Ford 5.0L Mustangs equipped with the ROUSH 5.0L supercharger kits producing 525 or 540 horsepower
  • Maintains original 3 Year/36,000 Mile Powertrain/Drivetrain warranty.
  • Part # 421387
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The 575 HP ROUSH Phase 1 Supercharger Upgrade Kit includes all of the necessary components to increase your 525 HP or 540 HP Ford Mustang to 575 HP and 505 lb-ft. The supercharger upgrade kit comes with a new 85mm S/C Pulley, Shorter FEAD Belt ROUSH Flash Vouchercardand Installation Instructions.
This part now utilizes the ROUSH Flash Voucher card to be calibrated using the ROUSH Diagnostic Tool (RDT) software and pass-thru device. If you do not have access to an approved pass-thru device, you can send your PCM back to ROUSH to be flashed for additional $100.00 fee.

Please contact Customer Care at 800.59.ROUSH if you have any questions

The ROUSH 2011-2014 Mustang Supercharger 575 Upgrade Kit is part of the TVS (Twin Vortices Series) family line of superchargers developed by ROUSH that have raised the bar for performance and reliability. The TVS supercharger is the same line that has been used and proven for years in ROUSH-built Ford Mustangs. Easily upgrade the horsepower and torque of your 2011 to 2014 ROUSH supercharged 5.0L Mustang.

This part now utilizes the ROUSH Flash Voucher card to be calibrated using the ROUSH Diagnostic Tool (RDT) software and pass-thru device. If you do not have access to an approved pass-thru device, you can send your PCM back to ROUSH to be flashed for an additional $100.00 fee.

Please contact Customer Care at 800.59.ROUSH if you have any questions

>> View the ROUSH Supercharger Application Guide

Mustang: 2014, 2013, 2012, 2011

  • Difficulty: Intermediate
  • Time: 1 hour
  • Required Tools: Basic tools

Customer Reviews:

Average Rating: 5 / 5
Rating of 5 out of 5 stars
(6 reviews)   >> Write a review

Awesome

Rating of 5 out of 5 stars 5 / 5

By   October 24th, 2012

Hi Roush, I Bought a 2012 RS3 at the beginning of the year. I love the car and thought, "holy crap this thing is a missile!" I didn't think it would be that big of a difference but man was I surprised!! The car feels like it punches you back into the chair as you accelerate... incredible. I find myself grinning from ear to ear everytime I turn it on. Everyone in my neighborhood knows when I get back from work because nothing else sounds this good/loud. The noise that comes out of the supercharged 5.0 is just rude past 9pm :) Anyways great job Roush. If only the phase 2 maintained my warranties..... sigh maybe later. Sincerely, Greg, Kona Blue 2012 Roush RS3 #104

Awesome

Rating of 5 out of 5 stars 5 / 5

By   October 24th, 2012

Hi Roush, I Bought a 2012 RS3 at the beginning of the year. I love the car and thought, "holy crap this thing is a missile!" I didn't think it would be that big of a difference but man was I surprised!! The car feels like it punches you back into the chair as you accelerate... incredible. I find myself grinning from ear to ear everytime I turn it on. Everyone in my neighborhood knows when I get back from work because nothing else sounds this good/loud. The noise that comes out of the supercharged 5.0 is just rude past 9pm :) Anyways great job Roush. If only the phase 2 maintained my warranties..... sigh maybe later. Sincerely, Greg, Kona Blue 2012 Roush RS3 #104

Better than I thought.

Rating of 5 out of 5 stars 5 / 5

By   November 1st, 2012

The 575 HP upgrade to my 2012 RS3 turned out to be better than anticipated. The tune is much better that that used in my original 540 HP set up. I experienced quite a bit of hesitation when shifting through the gears with the original tune and that hesitation has been totally removed. Throttle response is greatly improved and there is definitely an noticable difference in overall performance. Definitely a good investment if you want improved performance at a resonable cost while maintaining the 3 yr., 36 month warranty which was very important to me.

Stand Back Jack

Rating of 5 out of 5 stars 5 / 5

By   November 12th, 2012

After the upgrade I can't stay out of the car. I want to take it out every day, it's that much fun to drive. You hit a home run with the upgrade and I now feel the Camaro's have reason to hide when they see and hear me coming. RS3 2012 #12-0268

Quick & Easy

Rating of 5 out of 5 stars 5 / 5

By   April 29th, 2013

Just had my first ride after the 575 upgrade happy, happy, happy good instructions what a difference for a little time investment way to go. Hyper Series Matt it Mango #10

Money well spent

Rating of 5 out of 5 stars 5 / 5

By   July 15th, 2013

Previously, my engine would stumble warming up and when driving. This Upgrade Kit has made my 2012 Roush Stage 3 a totally different machine. No more engine stumble at idle, no hesitation from the super charger when you put the peddle to the metal. The sound of the exhaust has also changed to a low baritone rumble and the gas mileage has also improved. If you want to improve your engine performance this Upgrade Kit is an excellent choice . Well done Roush!

* Please note that prices stated here are only for sales within the continental United States only ordered via the ROUSHperformance.com web site. Prices for other territories, such as Canada, may vary due to shipping fees, duties, and other factors. Please also note that orders placed on the ROUSHperformance.com web site can only be shipped to areas within the continental U.S.