BDX Service :: USA Crankcase Borework Machining for Big-Bore Kits engine This design blocks out large

This design blocks out large trail debris while allowing fine dust particles to pass through

Adjust valves after break-in period

THIS IS NOT A CYLINDER HEAD

Want to know how it works on the inside

BDX Service :: USA Crankcase Borework Machining for Big-Bore Kits engine This design blocks out largeABOUT BDX PERFORMANCE BDXP is the leading USA technical expert in the Chinese vehicle off road market. Our engineers and technicians have helped thousands of people in the past twenty years keep their vehicles running. We have a full machine shop where we manufacture performance parts and engines to get maximum performance out of your vehicle. DESCRIPTION Send us your crank case or purchase a new one and we bore out your case to accepts the 62mm big