Originally Posted by
presidential
Dynomat, Hushmat and a few others. They're all the same. Tar stuck to some sort of metallic tin-foil crap.
I'd skip it...it doesn't help performance. I've got a nice car and a crap car...it's not like S13s are expensive.
But it's sound deadening. Thats basically what I want. especially for long trips. I hear everything in my car.