Can you run headers (LT's) and the STS kit?
Its not necessarily that there arent any gains at all...just that no one has solid evidence of before/after testing containing hp gains/losses. Many have said itll spool faster due to increase exhaust flow. Mainly, the idea is, its not worth the $ to use em with a rear mount, unless of course you like the sound (loud).
yeah I do like the sound, but wouldn't that mess up ground clearance even more with LT's? I have a set of headers that I haven't put on, and I think I'll sell 'em.... unless the turbo is too quiet and maybe I'll put those bad boys on 
