Here's a video comparing the 3-Valve and 4-Motors. The Cobra has a 4-Valve out of an '04 Mach 1. It is catless and running through the glasspack sidepipes. The Mustang is running a Pypes O/R H-Pipe and the Pypes Mid-Muffler System. If you are expecting a bolt in install, avoid this exhaust at all costs. Lemme know what you all think. Before people ask, the clacking is the lens cap hitting the tri-pod in the wind.
Cobra, Mustang, S197, FFR, Factory Five, Pypes, Mid, Muffler, Pipe