Skunk2 Pro Series Billet Throttle Body to Manifold Adapter - Honda B to K-Series (RBC) - 309-05-0005Skunk2 Racing now offers a solution for installing the Skunk2 Pro Series or Alpha Series B D F H Throttle Body onto the Skunk2 K series intake manifold w RBC style flange. Commonly refereed to as K to H manifold swap. The adapter has a 68mm opening as well as an 1 8" NPT port for additional flexibility. Works with B16, B17, B18, B20, D16, F20C, F22A, F23A, H22A, and H23A throttle body. Features: CNC Machined 6061 Billet Aluminum Anodized for Corrosion