Our RRC inlet manifold adaptor is manufactured in the UK. Fitting an RBC intake manifold to your K-Series engine is one of the most cost effective, performance enhancing parts you can purchase. In order to fit one however, you ll need one of these, because the manifolds were designed by Honda to run K24 throttle bodies. This CNC machined plate allows you to utilise your original K20A/K20A2 throttle body, meaning your Civic or Integra will soon be breathing harder and more efficiently.