Precision Works RBC RRC Dual Throttle Body Adapter K20 K24 62 70mmPrecision Works RBC RRC Dual Throttle Body Adapter K20 K24 62 70mm PLM throttle bodies adapters for the K Series are designed to adapt RBC or RRC manifold flange to be used with our billet throttle body or K20A A2 A3 Z1 throttle bodies. Throttle body adapter flange to fit K20A throttle body onto RBC RRC manifolds Fits K Swaps K20 K24 Precision CNC machined from billet aluminum 6061 grade aluminum Fits both 62. 5mm and 70mm Throttle bodies Includes