in my opinion all test pipes are pretty much the same... about a 18" long piece of tube, how much difference can one be from the next? I have test pipes on my 370 used in conjunction with a ARK catback with x-pipe. Sounds just fine, and imo not loud at all. I have very very little drone, and certainly not raspy by any means. These 3.7's sound unique and never heard anything like them before
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2012 370z
6MT "Sport Package" Z1 CSC, Z1 Test Pipes, ARK Catback, Injen CAI, SpeedBooster, Custom PCV Canister setup, Z1 dyno tune coming soon
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