If you already love the Roush Phase 1 Supercharger in your 2005-2009 4.6L Mustang, then it's definitely time to continue your pony's upgrades! Order this Roush Phase 1 to Phase 2 550 Horsepower Supercharger Upgrade Kit (421101) from CJ Pony Parts today!
Features and Benefits:
- Sold as a complete kit!
- Provides more power and performance
- Increases to 550HP and 550 lb-ft of torque
- No double parts
This upgrade kit will allow current owners of the Roush Single Belt Phase 1 Supercharger (42110) to easily upgrade to the Phase 2 system for even more power and performance! You'll absolutely love the increase to 550HP and 550 lb-ft of torque, a definite increase over the Phase 1's 475HP. Roush took the time to develop their supercharger systems to be easy to upgrade--you can buy in at one phase in the line and upgrade later while reusing as many parts as possible from the kit that you already have! No double parts, no wasted money—instead you'll just need a few new pieces to help get your Mustang to the next performance level.
- GT500 Fuel System Upgrade
- 80mm Supercharger Pulley
- 6-rib Serpentine Belt
- Roush Flash Voucher Card
Tech Tip: This part now utilizes the Roush Flash Voucher card to be calibrated using 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 fee.
- 2005-2009 4.6L Mustang