HONDA RBC Intake Manifold. The famous RBC manifold is a genuine Honda part. However straight out of the box it needs modifying and will not fit the K20. Ours are modified here in the UK on our CNC vertical machining centre, and are therefore ready to fit straight onto a FN2 Type R. With Hondata K-pro this manifold can give +15-25bhp over the standard inlet manifold depending on your car model. This will fit a FN2 Civic Type-R , Accord CL7 Euro-R and the Honda K24 head. This is an ' uncut version' meaning it will fit the RBB style head but would need modifications to fit the PRA head.