Skunk2 Alpha series is a new line of product for the budget racer. Quality Skunk2 goods at a lower price! The new Skunk2 Alpha die-cast throttle body looks completely OEM yet at a larger diameter bore. Available in 66mm or 70mm (intake manifold port matching required of course). Compared to other die-cast throttle bodies on the market, Skunk2's difference is in the details! Full Skunk2 customer service support along with a limited lifetime warranty is fully included.  Key features Idle adjustment screw OEM casting and appearance 22-28% larger than stock 12-15 WHP gains Countersunk stainless mounting bolts Fully machine throttle bore Solid brass throttle plate Fine shot-blast surface finish  Vehicle / Engine compatibility 92-00 Honda Civic (D-series) 90-01 Acura Integra (B-series all) 97-01 Acura Type-R (B-series) 99-00 Civic Si (B-series) 92-01 Prelude (F & H-series all) 90-02 Accord (F-series) 00-05 S2000 (F-series F20C)  Please note Intake manifold match porting may be required to reach full potential Die-cast throttle body outter diameter is larger (approx. 3") than an OEM throttle body (under 3"). An after market intake system or coupler that supports a 3" diameter throttle body is highly suggested.