Right now i have stock piping and an OBX rear section.My question is about bumping up the size of after cat piping.How big should i go? i don't mind losing a little low end, and i want my car to get louder as the revs go up, because right know it is only loud at about 2800-4000 rpm's. Should i put a cherry bomb resonater in place of my stock one? TIA

2.5" off the DP to a race muffler and you're set. Your car will be very loud and your low end should improve, if anything.

I was curious about this very same thing. What is the stock piping diameter. Is it 2.25? I was thinking of taking my car to an exhaust specialist this weekend to put a custom mandrel-bent pipe on my car to go with my Tenzo-R muffler I already have. Am I right in thinking we have stock 2.25, and I'm suppose to ask him for 2.5? And also, will going to that .25 wider diameter make much of a difference? Thanks in advance.

Stock pipe diameter is 2". I think 2.5" is a good diameter for modding NA.

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Michael J. Kulaga
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All motor in the making.

Injen CAI, 55mm TB, P&P Intake Manifold, Crower Stage 2 Cams, Hooker Header, GS-T Muffler, AFX UDP, S-AFC, 8.5mm Magnecor Wires, Crane Fireball HI-6DI2, FU/RU/RL STBs, TSW Blade 17x7.5, Bridgestone Potenza RE730, Front KVR Cross-Drilled Rotors & Carbon Fiber Pads

To Be Installed: P&P Milled Head, Rear Disc Brakes, Rear KVR Cross Drilled Rotors & Carbon Fiber Kevlar Pads, SS Brake Lines