Fundamental to internal combustion engines performance is the ability to draw in the petrol/air mixture as efficiently as possible, and vitally, keep the mixture in place when the piston comes up to compress it (ie: not leaking out through poorly seated valves).
When overhauling the cylinder heads this component and the ones listed below are just some you may require to ensure the valves open and (completely) close in the right way at the right time!
This component may have other applications in the Honda model range.
Add as many items as you wish to the same shopping cart, new gaskets, valve springs and valve stem seals for example, and still only pay the same single fixed price shipping cost.