HomemadeTurbo - DIY Turbo Forum

For the little amount of boost you're running, 3" is a waste unless you plan on boosting a lot more later. 2.5" is perfectly adequate for up to 500 HP according to Maximum Boost. I took all this into consideration when upgrading my setup. I had a speed factor to contend with as well since my other midpipe fell off and I only had my header, a high flow cat and about 2' of pipe for my exhaust. It is a bit loud and the carbon monoxide fumes make me want to pass out on my drive home from work. I bought the OBX midpipe. It's 2.5" mandrel 304 SS and is a direct replacement. It has a resonator built into it as well. I figured for $90 shipped from SSAutoChrome on ebay, I really couldn't go wrong. I know people knock them for the turbo mani's, but the welds on the midpipe look fine to me. I haven't put it on yet, I'll be doing that tuesday or wednesday when I can get over to my buddies garage and use his lift. Right now my midpipe and muffler are in the passenger seat of my car in case I get pulled over or anything ;)