Honda Genuine RBC Intake Manifold
The best bang for buck intake manifold upgrade on the market for K series engines.
It's as simple as that.
Please note for DC5/EP3 owners, you'll need a throttle body adaptor to use your existing throttle body or to purchase an S90 CL7/9 throttle body which will bolt on. In this scenario, the EVAP sensor is different so a K-Pro or similar is required to turn this sensor off. The coolant port must be cut off also.