Roush's 420131 air intake & axle back 421127 exhaust for the 2011-2014 Mustang GT.
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- Fits 2011-2014 Mustang GT & Includes air intake with filter and axle-back exhaust
- Air intake features re-oilable red filter; Gives 8 horsepower, 8-ft-lb of torque & improved mileage
- Exhaust uses all factory hanger locations; Includes clamps, pipes, mufflers & oval tips
- Intake & exhaust have no negative impact on emissions
- Made by Roush and covered under warranty
