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It'll def. make your exhaust sound a little louder, but I guess the main (big) bottleneck that we are going to have with the N55, much like the N54 is the main Cat on the downpipe... You 335 guys will probably have an aftermarket DP from AR or someone else in no time at all, but me with an X5, probably won't have any options when it comes to an aftermarket dp...
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BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi)
2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune |