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I'm in the same boat with you - don't want to void a warranty on my 14 that I just bought on 12/07/13. I added a K&N CAI and my next will be shorty headers. They won't pack the performance of long tubes but the shorty's don't need a tune and won't throw CEL alarms as they bolt up to the stock cats, and you should get 10 or more RWHP...plus a little more tone from the stock exhaust. I was going to do a cat back or axel back, but as stated - that upgrade is mostly for sound and does not add to performance. Once I have miles and a few yrs burnt from the factory warranty - that's when I will do more intensive performance mods.....this car is my daily driver and that's my 1st priority.
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