Description
If you are doing a 171cc big bore kit and want to kick it up a notch, here ya go! This big valve head with larger porting will allow more air in and more air out, resulting in more power! This will fit most QMJ157. Please refer to the video in this listing for fitment, because there are some engines this will not work on, and we explain why!
– Exhaust Valve Diameter: 23mm
– Intake Valve Diameter: 28mm
– Exhaust Port Diameter: 27mm
– Intake Port Diameter: 28mm
– 8mm Exhaust Studs & Nuts (included)
– 6mm Intake Studs (included)
THIS HEAD HAS A 54MM STUD SPACING (GY6 A)
ATTENTION BUGGY/ATV OWNERS: WE HAVE NOT PERFECTED ALL THE GY6 ENGINE MODELS IN THE BUGGIES TO KNOW IF THIS WILL FIT OR NOT. BUY AT YOUR OWN RISK.
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