Welcome to the forum ajh. We are the authority here on XP 800's and the differences between them and other X4's. I just say this because of the "hand built" line and you thinking I'm wrong with my aftermarket parts answer. I'm the guy that's holding those old MT modules and tons of other aftermarket goodies. Please feel free to ask more questions. I can also program a higher rev limit, more aggressive timing curve, and different initial timing settings in your stock grey box.