I just had my FI exhaust installed a couple weeks ago. I went with the 18" resonators, but I also had resonated Test Pipes installed. So far, I've noticed a little drone at certain RPMs, but it's not bad at all. As for the mufflers, I have yet to scrape anything on my stock NISMO (knock on wood!).
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Current Ride: 2012 Nissan 370Z NISMO #0389
Mods: Fast Intentions Resonated Test Pipes and TDX Exhaust with 18" Resonators (#1054), K&N Drop-Ins, GTR Start Button
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