I currently have mac's, ory, and a bassani catback. I'm wanting to go to a set of pacesetter LT's with a TSP catted Y. Couple of questions, what length O2 extensions will I need, will I need to protect the plug wires, and I've looked at the pictures of the tsp ypipe but where the hell do the rear O2 sensors mount. I'm planning on replacing the plugs, buying stage 8 bolts, is there any other items I will need to pull this off?

 

I'm assuming you are doing this on an LS1? If so, 12" extensions should work fine. As for the plug wires, I think you should be okay considering you have a coil per cylinder setup and the stock routing offers a good amount of clearance from the exhaust. I can't remember off hand about the TSP pipe, its been about three years since I last seen one. If it doesn't have 02 bungs, you can either weld them in yourself, or go the other option of tuning out the rear 02 codes from the PCM or just installing a pair of 02 sims into the harness connectors. Replacing the plugs and wires is always a good idea. As for the header bolts, Stage 8's are a good upgrade, just a PITA to install them. Just curious, why are you switching from mids to long tubes? You won't see a drastic power gain by going that route unless you are looking for a sound difference?

 

Thanks for the great information. The main reason for switching to lt's is that I'm trying to get the car "emissions legal" I've been running around w/ an ory for sometime now. Unless programming out the egr and rear o2's will allow me to pass inspeciton, I figured I would upgrade to lt's. I know there wont be much of a power difference, but I looked at the cost of a catted y for the mac's and would rather pay double and get lt's. Almost forgot, it is an ls1

 

Well another problem with this though is that if you are going for emissions legality, technically long tube headers are not legal either. The reason being is that the long tubes move the cats from their factory location.

 

Yeah I'm aware of that thats why I put the " " around it, just figure it would be better than my current setup