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Roush Phase 1 to Phase 3 Supercharger Upgrade Kit (11-14 GT)

1 Reviews
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  • Item #69136
  • MPN# 421596

  • Market Price $1,499.99
  • You Save 4% ($60.00)
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  • Upgrade to 675 Horsepower and 585 lb-ft of Torque
  • Includes 3 Year / 36,000 Mile Limited Warranty on Roush Parts Only
  • Roush PCM Flash Voucher Card Included
  • Fits 2011-2014 Manual GT Mustangs with Roush Phase 1 Supercharger Installed
More Horsepower! Increase the power of your Roush Phase 1 supercharger to an impressive 675 horsepower and 585 lb-ft of torque with a Phase 1 to Phase 3 Supercharger Upgrade Kit. That's an increase of 100 horsepower and 80 lb-ft of torque.

Kit Includes. The Roush Phase 1 to Phase 3 Supercharger Upgrade Kit includes a new 80mm Supercharger Pulley, Fuel Pump Voltage Regulator with Plug-n-Play wiring harness, Cold air intake with 110mm MAF, 2085mm 6-rib serpentine belt, ROUSH PCM Flash Voucher Card and installation instructions.

Roush Performance quality - guaranteed. Roush is known for a rich tradition of excellent racing performance engineering at the highest level of OEM quality and design. This Supercharger upgrade kit includes a limited 3 year / 36,000 mile warranty on the Roush parts only.

Upgraded ROUSH PCM calibration. ROUSH® PCM calibration is a success of engineering that maximizes the power of the system. ROUSHcharger owners will receive a ROUSH® PCM Flash Voucher Card, which is used to obtain the specific calibration needed for your Mustang and requires ROUSH Diagnostic Tool (RDT) software and a J2534 Pass-Through device to upgrade your PCM (software and pass-through device not included).

Application. This Phase 1 to Phase 3 Supercharger Upgrade Kit works for 2011-2014 GT Mustangs with the Roush Phase 1 supercharger installed. Fits manual transmissions only. Does not fit BOSS 302 models. NOT approved for sale or installation in the state of California.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • Fuel Pump Voltage Regulator
  • Plug-n-Play wiring harness
  • Cold Air Intake System with 110mm MAF
  • 2085mm 6-rib Serpentine Belt
  • 80mm Supercharger Pulley
  • ROUSH PCM Flash Voucher Card
  • Installation Instructions
Installation Info
Will it fit my Mustang?
  • GT - 11, 12, 13, 14

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Customer Reviews (1) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Afternoon

  • Performance Gain 5 5
  • Fit 5 5
  • Bang For Your Buck 5 5

  • 5/5

    Installation Time: Afternoon

    January 25, 2014

    Holy ****!!!

    Let me start out by saying I'm writing this review from my iPhone, with my 18 month old daughter climbing all over me. Well, that said, I love this mod. I bought my 13 ROUSH stage 3 with the phase one supercharger in it from the dealer. It was nice and fast. It still wasn't fast enough to match the sticker price though so, I had to upgrade to the phase 3 supercharger. Within a month I got a gt 500 rear end (cuz I broke the stock one, don't ask) the phase 1 to phase 3 supercharger upgrade and a one piece aluminum drive shaft all from AM. I also bought an MGW short throw shifter (from MGW) cuz as we all know the stock one is garbage! Well I work at night and sleep during the day so, once I had all my parts my buddy had me drop off my car at his place where he installed everything, I mean everything within a few hours using basic hand tools. The PCM does require custom calibration by ROUSH so, you must remove it and ship it to them so they can tune it for you. It cost 80 bucks to ship overnight, but ROUSH was supposed to cover it, I just forgot about it literally until now, well ****! Anyway. From start to finish it was only three days. Roush is fast with that turn around. I'm in north Florida by the way. The performance gain was substantial and immediately noticeable! I've yet to have it dynoed due to the lack of shops near me (that I know of), but holy **** is it much faster now. As far as track time goes I'm sorry to disappoint anyone, but my work schedule doesn't really allow me to go, plus the only one near me is only an 1/8 mile track. Now, this isn't just my weekend car, it's my DD and as far as drivability goes it's awesome. It isn't noticeable until you get on it (the throttle I mean) and when you do, hold the **** on to her! My average MPG right now is overall since I bought the car, 13.9 MPG and my current average MPG according to my car is 14.2. I do drive like a maniac though, if that offends you well, I'll just go on living my life. Well, I hope this review was somewhat helpful. Once I dyno my car I'll post an update on my current hp/tq.


    Year: 2013 Model: Other Driving Style: Daily Driver 'Stangs I have owned: 1 Panama City, FL, USA

    Helpful (3) (5)

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