170cc Big Bore V4 Complete Head Kit

Description

Requires the use of Iradium spark plug: NGK-ER9EHIX (part NGK-ER9EH) or Denso # IY27, IY29 or IY31

• Unique four-valve design increases air flow and performance
• Provides more power and torque
• Ideal engine part to complete Koso’s Big Bore kit
• Features a forged piston, stainless steel 24mm intake valves and 20mm exhaust valves

Our Koso 4V Head Kit is the ideal engine part to complete the Koso Honda Grom Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This new designed head is the perfect addition for those who desire more power and torque. The 4 Valve Head Kit features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves.
MC623000 made by Koso