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Universal Parts GY6 57mm Cylinder Head - PAIR Type — product image 6

Universal Parts GY6 57mm Cylinder Head - PAIR Type

$78.00
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Universal Parts GY6 57mm Cylinder Head - PAIR Type — product image 6
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  • Universal Parts GY6 57mm Cylinder Head - PAIR Type — product image 6
  • Universal Parts GY6 57mm Cylinder Head - PAIR Type — product image 7
  • Universal Parts GY6 57mm Cylinder Head - PAIR Type — product image 8
Universal Parts GY6 57mm Cylinder Head - PAIR Type

Universal Parts GY6 57mm Cylinder Head - PAIR Type

$78.00
Part number 164-302

Check dimensions and compatibility before ordering.
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Get your GY6 rebuild moving with the Universal Parts 57 mm PAIR Cylinder Head for GY6 150cc engines. This complete replacement head includes installed intake and exhaust valves, valve springs, and intake and exhaust studs, helping you replace a worn or damaged head without starting with an empty casting. Cooling fins and machined sealing surfaces support the original air-cooled engine layout, while the PAIR provision accommodates the secondary-air emissions system.

Features

  • Complete Valve Assembly: Installed intake and exhaust valves and springs simplify your cylinder-head replacement.
  • PAIR-Compatible Design: Accommodates the Pulsed Secondary Air Injection system, which introduces air into the exhaust flow to help reduce hydrocarbon and carbon monoxide emissions.
  • 57 mm Application: Designed for compatible 150cc GY6-A four-stroke engines.
  • Included Mounting Studs: Intake and exhaust studs are included for connecting the manifolds.
  • Fit-Check Dimensions: 54 mm head-stud spacing and 60.5 mm overall height help you match the replacement to your engine.

Specifications

  • Brand: Universal Parts
  • Part number: 164-302
  • Manufacturer part number: 4787
  • Type: Complete emissions-type cylinder head
  • Engine platform: GY6-A four-stroke
  • Primary application: 150cc QMJ157
  • Bore application: 57 mm
  • Overall height: 60.5 mm
  • Head-stud spacing: 54 mm
  • Diagonal head-stud spacing: 76.5 mm
  • Diagonal valve-cover bolt spacing: 144 mm
  • Intake valve diameter: 29 mm
  • Exhaust valve diameter: 23.5 mm
  • Emissions provision: PAIR secondary-air system
  • Included: Installed valves and springs; intake and exhaust studs

Model Fitment

Engine application Fitment requirements
GY6-A 150cc QMJ157 / 157QMJ Match 57 mm bore application, 54 mm stud spacing and head configuration
GY6 QMI/QMJ 152/157 applications Confirm cylinder bore, stud spacing, valve-cover bolt layout and PAIR arrangement before ordering

 

Match the engine code and dimensions to your existing head before installation. For an off-road vehicle that was not equipped with a secondary-air system, the PAIR provision can be blocked off as appropriate for the installation. Do not treat this as a universal fit for every GY6 engine.

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