Alright well searched around some and didnt find the answers or questions I was looking for so will ask.


#1. Which would be wiser to go with an XTC catted downpipe or the ZZP catted downpipe? was going to order the xtc one but then found the zzp piece.

#2. Is the ZZP LSJ throttle body upgrade worth it with a full exhaust cai 2.4 auto car?

#3. is my best bet for tuning an 08 LE5 buying an extra ecm and having it tuned and keeping my stock gm tuned for warranty issues?

#4. Whats everyones opinion of the SLP loudmouth catback? (was going with it due to quality and price as well as a fairly stock appearance)

#5. While its the performance that matters and not the hp #'s. What kind of hp could I expect from the following? Catback,catted downpipe, Cai,LSJ throttle body,Gmpp header.

Pretty much want to do a build that is either easy to swap back to stock before going to the dealership or can just be driven into the dealership as is and have next to zero warranty concerns.

Thanks