Complete Engine Cylinder Head Assembly with Valves EN-H0001+EN-G0004

This complete engine cylinder head assembly includes pre-installed intake and exhaust valves plus all covers. The intake valve measures 23 mm and the exhaust valve measures 20 mm. It is listed for most 110cc and 125cc 4-stroke ATVs, quads, and four-wheelers. It does not replace a 125cc cylinder head using 23 mm intake and 28 mm exhaust valves.