Agreed but I would add, Ford must meet not only emission but noise requirements. The silencer does quiet the car. The problem is it's the equivalent of you running a marathon breathing through a straw.
It's a plastic piece Ford had to use to conform to federal NVH standards (noise vibration harshness). Believe it or not, there are those who would complain over hearing the rush of air being pulled into the engine and the silencer eliminates this whoosh.
It's inside the fender, right where the air filter is. There should be 3 bolts holding it, remove it and you'll get a couple of horses.
There have been some that insist on gutting the thing... what's the point of that? Just remove it rather than trim and shave the inside of a piece of plastic to make it larger. That's like trying to breathe through a straw but rather than eliminating the straw, you just make it bigger.
If you take it off, don't destroy it or throw it away... you can actually get some money for it.
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!