Hybrid Racing K-Series Throttle Body Adapter OEM 64mm - HYB-TBA-01-64Used to adapt your K series throttle body to your RBC intake manifold. Includes all mounting hardware and rubber plugs. Incorporates two 1 8th NPT vacuum ports. Available in both stock 64mm and 70mm sizes. 6061 T6 Aluminum anodized silver. The RBC manifold provides a significant performance improvement over the stock PRB and PRC (K20A2 Type S and K20A Type R) intake manifolds. To complete the intake manifold conversion, you need to couple the throttle