I plan on buying MAC LT's (per you guy's suggestion), an o/r x-pipe, and MAC flowpaths. Can I just weld them in to the stock catback? Or is it worth investing in a 2.5" catback? I ultimately want to have about 350 rwhp. Will the stock catback support this much power? Also, does anyone have an exhaust clip of this? I couldnt find one on DonJohn's page. My buddy with an 04 terminator has BBK LT's, BBK o/r x, and MAC 3" catback and it sounds but I dont know how similar mine will sound. Any help is greatly appreciated!
i have LTs and an o/r x pipe( although im gonna be switching back to my o/r h) and at one point i had the stock catback with welded-in borla pro xs muffs....when i installed then entire borla catback a month later, i not only noticed the difference in sound but huge difference in performance....if money permits, ditch the idea of welded in muffs and throw in a full catback!
I second the full cat back. If you are gunning for 350 at the wheels, you will want a full aftermarket exhaust. Stock will be a bit of a bottleneck otherwise. Plus, with the coin you would need to spend to get to 350 rwhp, a cat back will be a negligible expense.