Axel backs generally aren't that loud either. Find a mod friendly dealer and just do it now. My cars completely bolted and tuned and no warranty problems. But if you plan to go cat back you might as well go all out now and not waste money in the mean time.
Stillen CBE kinda sucks too, in my opinion atleast. Theres far better exhausts out there then stillen, fast intentions, MXP, powerhouse just to name a few.
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11 SR 370Z Sport 6MT - Sold
03 Escalade AWD - Sold
13 Silverado LTZ Z71 Crew Cab
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