Originally Posted by S0C0nFused
The most restrictive part of any exhaust is the cat.
What if you get a setup that is designed for a larger engine, like say a 6 or 8?
You put on a header but then everything else is like 3" (or for a larger engine)you have all the stuff, cat, muffler, resonator but everything is so large it flows as good as a 2" race setup?
Or does it not work that way?
I would think with a setup larger then whats designed for the car emmisions wise would pass but be so much more un restrictive it would help the engine breathe better.