Exhaust is just a waste for the price you pay. The stock exhaust isn't restrictive until around 300whp then it needs to be upgraded most will never reach that point. So basically your doing it for a different tone which can be achieve much cheaper by cutting off your stock mufflers and welding whatever mufflers that you want.


Read this

http://www.grandprixforums.net/safel...0-a-67580.html