Hello, every one. I need your help here. I have a 97 Pontiac Bonneville SE 3800 Series II engine (L36) with OBD II emission system. and I DONT want to throw a code out. Im looking for a high flow catalytic conveter for my car and where to buy one at and what kind should I buy.

And I need a AC Delo O2 sensor for the car there is one in front of the cat and after the cat. I like to know what store that I can drive to and get them at like autozone or some store like that. please i need your help on this.

Thank you robert

Magnaflow Hi Flow cat from www.justmagnaflow.com you have a 2.5" inlet and a 2.5" outlet.

AC Delco O2 sensor ONLY from www.gmpartsdirect.com and don't bother with the rear O2. It only deals with emissions, not performance or efficiency. Part numbers are in Techinfo (link at the top of the page) and you save 40% over dealer retail at that site.

Magnaflow Hi Flow cat what one should be good for my car part # ?

thank you robert