Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Exhaust leak/cat ?

You can change the 2.25" pipe for a 2.5" one, this with allow the air to flow more evenly and less restricted.
I'm not sure if this with be a huge gain in performance, but it will produce a slight increase in
the loudness of your exhaust.

On my setup I have gutted pre cats, y pipe un-optimized, 3" flex pipe, stepped down to 2.5" piping
to the tail pipe. Magnaflow high flow cat and 2 Magnaflow mufflers. This is a single exhaust.
Click on the link in my signature for pics.