I have a stiffy.

It's been laying around for years, never got around to doing anything with it (personal issues, eh? lol)

http://www.hopupracing.com/instentodani.html

Are they any good? I heard that they make alot of noise through teh firewall? SHould I have it installed along with the TT build?

The only thing I really hate about the G is the notchy drivetrain/engine mounts. Will this help any?