I love the sound of the exhaust but the supercharger whine is a bit loud at higher RPMs ... The 427R package is based on Roush's Stage 3 Mustang, with the main differences being a 5-hp bump ...

Roush builds several F-150 packages ... Even with 405 hp at 5400 rpm and 480 lb-ft at 4200, the obscenely loud supercharger whine flowing over the exhaust’s baseline thump amuses more often ...

the V-8 is not loud. Most of the time you don’t hear the engine or exhaust, and even with the pedal flat to the floor there’s very little of the typical supercharger whine. The Roush exhaust ...