SR 20 Series Cylinder Head
• CNC Ported
• 440cc Intake Ports
• 95cc Combustion Chambers
• 2.400'' Intake / 1.800'' Exhaust Valve Sizes
• Bare, Sold Individually
  
  

  This head is sold as an unassembled bare casting. It is finished machined and includes valve guides and valve seats installed. This head does NOT include rocker studs, valves, springs, retainers or locks.

  Cylinder Head Specifications
• Intake Port Volume: 440cc
• Combustion Chamber Volume: 95cc
• Valve Sizes: 2.400' Intake / 1.800' Exhaust ( 11/32' Stem Diameter )
• Spark Plug Configuration: Angled
  Facts and Related Components
• Torque Heads: 70 ft-lb.
• Torque Rocker Studs: 40-45 ft-lb.
• Intake Gasket: Brodix p/n 158-MG2021
• Head Gasket: 4.600' Bore - Fel-Pro p/n 375-1057 or Cometic p/n 245-C5434
• Exhaust Gasket: Fel-Pro p/n 375-1412
• Valve Cover Gaskets: Brodix p/n 158-MG2020
• Head Studs: N/A
• Head Bolt Washers: N/A
• Head Studs: Brodix SK HS SR 20 for Brodix Aluminum Block; AR 235-4323 for Cast Iron Block
• Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
• Valve Angle: 20° and 4° Intake, 13° and 4° Exhaust
• Angle Milling: .0066' per cc
• Flat Milling: .0050' per cc
• Pushrod Slots: Special
• Stud Girdle: N/A
• Rocker Arms: Requires Shaft System - Jesel KPS 441184 or T&D 3142
• Lifters: Standard
• Exhaust Pattern: Standard
• Spring Pockets: May not be cut any larger or deeper than 1.750'
• Accessory Bolt Holes are Drilled
• Recommended Intake Manifold: Brodix BM 2020 Standard Deck (p/n 158-BM 2020) / BM 2021 Tall Deck (p/n 158-BM2021)
• Minimum Bore: 4.600'

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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