First timer... Im about to purchase a 4th gen prelude. I was wondering if the H22a fits on "all" the preludes including the prelude S . I wanted an SI because it has the H23a1 so it sounds like a simple swap it sounds like a drop in. But im not sure about the f22a1. Also does the S and SI have smaller brake callipers and rotors than the real 4th gen vtec? I heard it does. Thats a good thing though I have a set of brake callipers and rotors from my buddys 4th gen front clip he bought when we did his H22a swap to his 91 accord.