I am gettin my f body magnaflow muffler tomorrow i want to know if i got the stock cat what would be the difference in the stock cat for a n/a and a stock cat for the supercharged engine??? I went to the pontiac dealership and noticed 2 part numbers one was $350 the other $637??? anyone has some proof on this why they r different???

Get a universal one from the exhaust shop. GM will make you walk funny...

a 2 1/2" high flow, or get some 3"one to fit would be fine.

ok that can work

where can i get a high flow one and any links?

A good muffler shop should have them. Ebay has a bunch of magnaflow ones cheap usually, or places like www.jegs.com or www.summitracing.com

Yup, I especially agree on the ebay part. Do a search on Carsound cat(alytic) convertor or Magnaflow (supposedly Magnaflow makes the Carsound cats). You should be able to get a high flow cat for your application for under $75 on ebay and that price includes shipping.


GIT-R-DONE!!!!

Catco is another good brand for Cats.

This guy sells Magnaflows on Ebay. He is very prompt about shipping.
http://www.performancepeddler.com

The one I was just about to post. $44 a piece for hi-flo. Example:

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2466801069