Phase 1 to Phase 3 Kit
If you are ready for more power out of your Roush Phase 1 equipped 2011-2014 Mustang GT, this Phase 1 to Phase 3 upgrade kit is for you! This supercharger upgrade kit pushes your Phase 1 Mustang up to 675 horsepower and 585 ft-lbs of torque. That’s an increase of 100 HP and 80 lb-ft of torque! This kit includes all of the necessary items to make the install quick and easy. Features a new ROUSH fuel pump voltage regulator to moderate fuel flow and provide your motor with the fuel it needs. A ROUSH plug and play wiring harness for a no modifications needed install. An 80mm supercharger pulley gets this kit producing more boost for more power!
(1) ROUSH Fuel Pump Voltage Regulator
(1) Plug-n-Play wiring harness
(1) 80mm supercharger
(1) Cold Air Intake
Part # 421596
The 2011-2014 ROUSH 5.0L Mustang Phase 1 to Phase 3 Supercharger Upgrade Kit is protected by ROUSH Parts limited warranty (ROUSH Supplied Parts Only), which is for 3 years or 36,000 miles from original installation date.
- Fits 2011-2014 Mustang GT w/ Phase 1 Roush Kit
- NOT approved for sale or installation in the state of California
Great power , easy to install .Took me around 4 hours to install
Yes, I would recommend this item to a friend!
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Night and Day Difference!
mike s. on
Installed the phase three kit with new BBK shorty headers and my 2012 RS3 is now a complete beast. The phase 3 kit along with headers really woke up this coyote 5.0! The car exhibits better throttle response now along with ALOT more power. I'm very pleased with the results.
Roush - The Art of Performance Engineering
ROUSH Performance is the first specialty-vehicle company to combine race-proven technologies with advanced automotive engineering. The result, a unique mix of street car and race car...Is a ROUSH car. Or more specifically, a ROUSH Mustang or F-150 pickup with styling, performance, and handling characteristics derived from the racetrack and modified for street legal usage. The vehicles and components produced by ROUSH Performance are imprinted with Jack Roush's vision, passion for performance, and commitment to excellence. He personally approves the design, engineering, fit, finish and overall performance of each package, ensuring that his personal standards are met prior to production and product release. Many of these products are designed by the same engineering group that has helped Roush Racing become the winningest Ford racing team in history.
Testimonial: Awesome products and great service!!!!
Your website was great to restore my 1991 LX mustang. I found everything I needed including great tech articles and even had to return the product with no hassle at all prices were great shipping go superfast of course free could not of asked for anything more. Once again great job and I will be purchasing more in the future.