Fits the GY6 125cc to 150cc Engine with a 60mm Tall Head,76mm Bolt Pattern & 4 Bolt Valve Cover Replacement cylinder head for 2024 Flywing Jog 150cc Non EGR Cylinder Head GY6 GOOFIT 57.4mm Cylinder Head Assembly Valve With GY6 150cc Chinese Scooter Moped ATV Engine Parts Inner Diameter of Cylinder: 57.4mm · Outer Diameter of Piston Pin: 15mm · Intake Valve: Outside Diameter 28mm / Length 66mm; Exhaust Valve: Outside Diameter 23mm... Such as JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, Dongfang, Kazuma, JCL, BMS 1.This Cylinder Head Will Replace The EGR Head as long as You Have The Correct Valve Cover 2.Replacement for GY6 150cc 4 Stroke Engine or Upgrade Your Older 125cc Engine to a 150cc Engine 1., This Cylinder Head Will Replace The EGR Head as long as You Have The Correct Valve Cover2., Replacement for GY6 150cc 4 Stroke Engine or Upgrade Your Older 125cc Engine to a 150cc Engine3., Fits Most of Chinese Made Scooters and ATV.