Thread: so first mod today (lil unsure)

IMO your problem was probably there before the CAI, or you messed something up. An open cone 3 inch would probably flow as well as stock. When I put a 4 inch CAI on my car, there was an immediate improvement according to the butt-dyno, front wheels spinning easily....and all the way to redline. It made a huge difference with the stock exhaust in place, u-bend included.