I I have a 96 big pin in my 92 X2. I just bought a new porp, v force reeds and an msd enhancer. The only other things that I am thinking about is a new exhaust and possibly a new head. I have a westcost head and exhaust on ther now. Any suggestions? Is the new head a good idea? What pipe should I go with? I hear a lot of talk about a factory exhaust manifold with a superjet chamber? Any good or should I do something else? Thanks