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Brodix 2208100

SR 20 Series Cylinder Head CNC Ported

158-2208100

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Ships 12/15/16 if Ordered Today
Brodix 2208100 SR 20 Series Cylinder Head CNC Ported $3,098.45
SR 20 Series Cylinder Head
  • CNC Ported
  • 440cc Intake Ports
  • 95cc Combustion Chambers
  • 2.400'' Intake / 1.800'' Exhaust Valves
  • 1.645'' Dia. Springs - 315# Seat Pressure
  • Titanium Retainers
  • Assembled, Sold Individually

  • Brodix 2208100 Details

    SR 20 Series Cylinder Heads

  • 95cc Combustion Chambers
  • 100% CNC Ported
  • Cylinder Head Specifications
  • Intake Port Volume: 440cc
  • Combustion Chamber Volume: 95cc
  • Valves: 2.400'' dia. x 6.030'' o.a.l. Intake / 1.800'' dia. x 5.930'' o.a.l. Exhaust ( 11/32'' Stem Diameter )
  • Valve Springs: 1.645'' Diameter - Open Pressure: 915 lbs.; Closed Pressure: 315 lbs.; Installed Height: 2.100''; Max Lift: .850''
  • Spring Retainers: 1.625'' 10° Titanium
  • Rocker Studs: N/A
  • Guide Plates: N/A
  • Valve Seals: 11/32''
  • 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''

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    Yes
    CNC-Machined Exhaust Runner
    Yes
    CNC-Machined Intake Runner
    Yes
    Combustion Chamber Volume (cc)
    95
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    Yes
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    Round
    Exhaust Valve Angle
    13
    Exhaust Valve Diameter (in.)
    1.8
    Exhaust Valves Included
    Yes
    Guideplates Included
    Yes
    Heat Crossover
    No
    Intake Port Location
    Raised
    Intake Port Shape
    Rectangular
    Intake Runner Volume (cc)
    440
    Intake Valve Angle
    20
    Intake Valve Diameter (in.)
    2.4
    Intake Valves Included
    Yes
    Lock Style
    10 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.85
    Number of Springs Per Valve
    Dual
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.625
    Quantity
    Sold individually
    Retainer Material
    Titanium
    Retainers Included
    Yes
    Rocker Arm Nut Thread Size (in.)
    7/16"-20
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    Yes
    Rocker Arms Included
    No
    Spark Plug Style
    Straight
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Perimeter bolt
    Valve Guide Material
    Phosphorous bronze
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    3-angle
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Positive stop
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    2208100

    Flows 507 CFM at .900'' !
    20°/4° Intake & 13°/4° Exhaust Valve Angles

    The Brodix SR 20 Series cylinder head is at the cutting edge of conventional Big Block Chevy compatible technology. This new offering raises the bar to a level that is unreachable by the competition! Inspired by TPSA technology, the SR 20 Series surpasses any other head in its class by leaps and bounds. Utilizing a .500'' raised 440cc intake port with a 2.400'' intake valve, this head flows an unheard of 507 cfm. The exhaust port flows an amazing 335 cfm through only a 1.800'' valve. To allow for the newly designed 95cc combustion chamber, the intake valve angle of this head has been rolled to 20-degrees. This head requires pistons, valve covers, head studs, shaft rockers, and an intake manifold designed specifically for the SR 20 series cylinder head. As always, these heads come standard with all the fine qualities that only Brodix has to offer. Every casting is poured from A-356 virgin aluminum and tested before Brodix utilizes their in-house processes such as finish machining and heat treating to assure that you receive the best products for your hard-earned money. The industry standard has been taken to the next level with modernized CNC porting. Other features include a thick deck surface that is compatible with nitrous, drilled and tapped holes on the ends for standard drive accessories, phosphorous bronze valve guides and hardened valve seats installed for unleaded fuel. Sold Individually, 1/pkg. Made in the USA!

      VALVE SPRING   Specs
      1.645'' Diameter Valve Spring for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 915 lbs.
  • Spring Pressure Closed: 315 lbs.
  • Installed Height: 2.100''
  • Max Lift: .850''