those tires are actually pretty good. very compliant ride.

will make your sport car feel like a wimpy sedan. :rofl2: ;)

I've used Streetwires mat and Hush Mat both work really good, but there is a price difference for sure. The lighter weight the stuff the less it does, and it needs the weight to reduce the vibration. However you don't need to cover every panel like me and a few others have to make a difference.
The other one you can try, not sure what pricing is like for you in the US, but Boom Mat from DEI, not the audio company. These guys, Boom Mat Acoustical Products | Exhaust Header Wrap and Thermal Performance Products | Design Engineering, Inc.

Oye, oye! Still has decent handling - I just don't think the Z handles like my old Bimmer (335i) though....still feels like a japanese car, but I'm not complaining much! Just trying to not get my ears to bleed on long rides :icon17:

Just way too much info out there!
Sound Deadening (CLD) Testing - Page 6 - Car Audio | DiyMobileAudio.com | Car Stereo Forum


Also, maybe I just need to apply the sealer or whatever to the underside of the wheel well liners? I haven't checked, but I'm assuming we have fairly thin panels.