Originally Posted by
BCS_ZHP
Ryan,
The 330/325 exhaust is different than the 323/328 exhaust. The angle where the exhaust mounts to the outlet end of the exhaust manifold manifold is different between the '99/00 cars and '01/06. You could make it work but would need to cut off the front end of your exhaust connection and have it welded to the front end of Rob's. Most likely would have to cut the front few inches of Rob's exhaust off, mount it to you car, then have someone determine how much of your exhaust needs to be cut off & welded on to make it all fit correctly.
Sounds like some trouble to do this but the result will be worth it. On the 323, the stock exhaust is too restrictive with the stock single piping, the dual pipingZHP exhaust will free it up and move your back pressure convergence point backwards. Moving that convergence point backwards moves the first heat concentration point backwards. And moving the heat away from the engine helps createmore power, you should notice a difference. Good luck with it.