Originally Posted by crabman
Your car is not a latest gen car and you are talking about a little bit of pipe and a couple cans here, not a complete system. Latest gen cars use cans that do not represent any significant restriction to the upstream exhaust flow. Get into the cats or install headers and you are talking about making real power. Do that and then change the cat back and you may get some power from it because the stock system downstream was designed to be just good enough for the stock system upstream.
Don't get me wrong, I love this stuff and I've done a lot of exhaust surgery. I'm kinda sad to see it coming to this but I can't ignore the realities either.
Well I do have a full system, I have headers, custom mids, resonator, and magnaflows. all true duals.
but on modern cars, a good catback with a little bit larger diameter pipe, high flow cats and headers. but I do agree that ON NEWER cars the factory systems are fairly decent. but I do think they can be improved upon. Problem with trying headers on new cars is that they are starting to go with integrated manifolds in the cylinder heads. the pentastar is like this. if you look at the 3.6 heads there is no manifold, its a single pipe off each bank. GM's 3.6 is the same way.