The best bang for buck intake manifold upgrade on the market for K series engines.
This is by far the best intake manifold Honda has made as far as power is concerned. The RBC manifold out performs the PRB and PRC manifolds almost everywhere. There is a little loss in power from low to mid range rpm but from the 5500rpm point and up the RBC takes the win by a good bit.
The RBC manifold is NOT a direct bolt-on for K20A/A2/A3/Z1 series engines but can be with a required modification. The water neck section must be carefully cut off in order to fit.
