Most people who buy the Skunk2 72mm Throttle body for their 06+ Civic Si will not be able to bore their intake manifold to 72mm. So P2R has come up with a solution for those to help you get as much out of your bigger throttle body as possible. This new tapered bore spacer from P2R starts off as 72mm and is tapered down to the factory intake manifold opening. This will allow for a smooth transition between the bigger bore throttle body and the factory intake manifold.
For more information call “1-800-997-TINT”