Hey guys I'm not a noob check out how long I've been a member, I've just been out of the game for some time. So my question is, when I had my 95 gsr I put a 4-2-1 headers, test pipe, and exhaust all the way out the back. I never paid any attention to whether or not I got better gas mileage when gas was $1.50 per gallon. So if I throw on a J-pipe and a test/race pipe on my 05 TL will my gas improve or get worse?