Pacesetter LTs, cats possible?
However if it was me I'd go for Texas Speed & Performance (----> a sponsor
) catted Y pipe. It uses pretty decent Magnaflow Carsound CATS so will flow well and won't really hurt HP on a bolt on LS1. Some people have issues with catted Y pipes hitting the underside of the car, I'd be tempted to fit poly motor and tranny mounts this stops the engine from torquing as much which is what causes the Y pipe hitting the underside of the car. Muffler also offer a Y pipe bracket also designed to prevent this. These are all available from Thunder Racing, also a sponsor ----->As for the O2's you have two options. Run O2 SIMS or if you have access to some tuning software or a local tuner simply tune out the rear O2's.
I'm really interested in hearing from anyone who might have this setup, at the very least, Pacesetter LTs with cats...not a pre-fab catted y, though...however few of you there may be.
Trending Topics
The Best V8 Stories One Small Block at Time
I have Pacesetter LT's and TSP true duals with cats welded in. You can get the cats for around $55 on ebay. They are 3" in/out magnaflows. You can hack the slip fits off the ends and buttweld them into the y-pipe if need be. Check out my sig for pics of how they fit.
Any decent exhaust shop should be able to throw them in for ya.
Shrugs

I ended up getting the TSP catted Y pipe, and it took two different muffler shops to get it right, after the install shop couldnt get it to work themselves

Cost me an extra 200 for that headache.. though still cheaper in the long run over the premium LT header and cattd Y set-ups.
^Ditto! I have Pacestters and I had the Magnaflows welded into my ORY. The muffler shop had to beat the hell out of the floorboard to get it to clear (I have very little ground clearance now, maybe 2.5" at most). Now the heat shield vibrates onto the floorbard upon decelerating. Really annoying.
Just make a makeshift bump stop using a piece or rubber the fits in between the floorboard and the cat.





