Just noticed the years of cars in your sig.Originally Posted by nawarkk
Ok a couple more questions:
Will the stock catalytic converter bolt up to the headers? Will it be removed or will I have to buy an adapter? Should I even worry about the Catalytic converter? Do I need to purchase a high flow Catalytic converter?
The headers exit at 3 in pipe by the Resonator which is a smaller diameter (2.25 in?). Would it be better to run 3 in pipping all the way back and get rid of the stock pipping that comes from the factory or should I just buy an adapter also? Is there a significant power loss from the 3in piping all the way back to the stock pipping?
Just making sure I have all my facts straight
This is just my opinion, based on my own personal experience with my 2002. On an '01 up, I would definitely run a cat. I didn't for a few years and no problems, but then suddenly developed the symptoms you will find in the following link. Poor mileage, surging idle, etc.. I installed a cat, turned the rear o2 back on and all the issues vanished.
http://www.grandprixforums.net/f65/r...ewer-7092.html
