How big of tires did you go in the rear?
Also, I have the same issue as you and even with 275's on the base 18"s- I can still hear vibrations. It is reduced though, like you mentioned.
If you have the time, call GTM Mat and order their sample of material and do your trunk. That might help a ton..
If I decide to buy their midpipe, im definitely going to have to mat my trunk
__________________
2009 Brilliant Silver BASE 7AT | TEIN S-Tech Springs | K&N Drop Ins & z1 Maf Tubes | AAM S-Line Short Tails | 5% Tint | 20MM Spacers | Sport Spoiler NickTurnon's 370z Build
|