If possible send your best modyfications for h22a jdm for street use

 

Euro-r intake manifold from Rosko, good headers like Hytech RMF SSR or they're replica counter parts, type s pistons and Neptune rtp

 

just do some research on different parts (pistons, headers, intake, etc.) and find dyno sheets to find what'll work for whatever your power goal is. In the end you might come up with a bette combo then what most people think is the "best" setup