Description
Big Valve performance Cylinder Head for GY6 139qma / 139qmb engine for maximum performance.
This Big Valve cylinder head is better as changing camshaft. With this GY6 big valve cylinder head you get most possible HP on your 139qma - 139 qmb engine.
Max. performance. Best to use with bigger carburetor.
GY6 139qma / 139qmb engine typ: GY6 139qma / 139qmb Motor Typ
















