Exhaust help 1999 trans am

**brian r** · 06-01-2009, 10:01 AM

Hello all I have a 1999 Trans Am (auto) I just picked up with 60k on it and I am tired of how quiet it is. I purchased a set of Pacesetter ceramic coated longtubes with matching Y pipe from ebay Speed inc. But I need help deciding which catback system to go with for power and sound a lot of guys have recommended the loud moth or magnaflow but not sure.any help would be appreciated and one last thing I noticed the new headers have the O2 sensor bungs welded in but the Y pipe doesnt what am I suppose to do as far as the back two O2 sensors are concerned weld in bungs or ?. New to the whole Ls1 thing long time ford guy recently converted so thanks guys and gals

**02Sweet** · 06-01-2009, 10:14 AM

Originally Posted by brian r

Hello all I have a 1999 Trans Am (auto) I just picked up with 60k on it and I am tired of how quiet it is. I purchased a set of Pacesetter ceramic coated longtubes with matching Y pipe from ebay Speed inc. But I need help deciding which catback system to go with for power and sound a lot of guys have recommended the loud moth or magnaflow but not sure.any help would be appreciated and one last thing I noticed the new headers have the O2 sensor bungs welded in but the Y pipe doesnt what am I suppose to do as far as the back two O2 sensors are concerned weld in bungs or ?. New to the whole Ls1 thing long time ford guy recently converted so thanks guys and gals

If you are not running cats you don't have to worry about the back 02 sensors. They can be tuned out.
For the catback system check out ls1sounds.com for some info
FWIW I have a LM1 with headers and a ORY it was cool at first but it gets raspier everytime I drive it. I am now looking at a different muffler