[surfbeast]

75mm is worthless. Save your money. Only so much air can be sucked into you engine and the T/B is not the restriction. The restriction is the intake/heads combo. Change those and then you need a bigger T/B.

P.S. - I finally got a C&L maf off E-Bay for a 100 bucks and it really helped my top end! If you don't have one check one out. Much better mod than a T/B, even if the C&L gains are minimal.