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Brodix 2121001

Man Eater PB 1203 Series Cylinder Head 475cc Oval Intake Ports


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Estimated ship date 03/05/18 if Ordered Today
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Brodix 2121001 Man Eater PB 1203 Series Cylinder Head 475cc Oval Intake Ports $3,742.91
Man Eater PB 1203 Series Cylinder Head
  • 475cc Oval Intake Ports
  • 68cc Combustion Chambers
  • 2.520'' Intake / 1.860'' Exhaust Titanium Valves
  • 1.645'' Dia. Springs - 330# Seat Pressure
  • Titanium Retainers
  • Assembled, 1/pkg.

  • Brodix 2121001 Details

    PB 1203 Series Cylinder Heads

  • 475cc Intake Port Volume
  • 1.645'' Diameter Valve Springs - 945# Open, 330# Closed Spring Pressure
  • Cylinder Head Specifications
  • Intake Port Volume: 475cc - Oval Port
  • Combustion Chamber Volume: 68cc
  • Valves: 2.520'' dia. x 6.920'' o.a.l. Titanium Intake (55° Valve Seat Angle) / 1.860'' dia. x 6.620'' o.a.l. Titanium Exhaust (55° Valve Seat Angle) ( 11/32'' Stem Diameter )
  • Valve Springs: 1.645'' Diameter - Open Pressure: 945 lbs.; Closed Pressure: 330 lbs.; Installed Height: 2.100''; Max Lift: .875''
  • Spring Retainers: 1.645'' 10° Titanium
  • 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 MG 2015 (p/n 158-MG2015)
  • Head Gasket: 4.540'' Bore - Fel-Pro p/n 375-1017, Cometic p/n 245-C5433; 4.600'' Bore - Fel-Pro p/n 375-1057, Cometic p/n 245-C5434
  • Exhaust Gasket: Brodix MG 2005 (p/n 158-MG2005)
  • Head Studs: Available Exclusively from Brodix - Brodix BR HS/PB 2005 CI BLK (12pt) for Cast Iron Block; Brodix SK HS PB 2005 (12pt) for Aluminum Block
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat
  • Valve Angle: 12° and 4° Intake, 6° and 4° Exhaust
  • Angle Milling: N/A
  • Flat Milling: .0055'' per cc
  • Pushrod Slots: Standard
  • Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
  • Rocker Arms: Shaft Mounted System - T&D 3070, Jesel KPS 390156
  • Lifters: Standard
  • Pistons: 12° x 6° Valve Piston
  • Spring Pockets: May not be cut any larger or deeper than 1.750''
  • Accessory Bolt Holes are Drilled
  • Recommended Intake Manifold: Brodix PM 1807 (p/n 158-PM1807) / PM 1817 (p/n 158-PM1817) / PM 1907 (p/n 158-PM1907) / PM 1917 (p/n 158-PM1917)

  • Specifications:

    Manufacturer's Part Number:

    Small Efficient Combustion Chambers!
    12°/4° Intake & 6°/4° Exhaust Valve Angles

    The Man Eater PB 1200 series takes the big block world to the next plateau! This head comes equipped with several features that include: 12° valve angle; raised, oval-shaped intake ports designed to achieve a delicate balance between horsepower and torque; and precision contoured shallow chambers with outstanding wet flow characteristics. The new BP PB 1204 series features raised 510cc intake ports that flow over 570 cfm and exhaust ports that flow over 350 cfm! The PB 1203 series is the latest in as-cast technology. It is the most powerful out-of-the-box head in its class. The PB 1202 series takes the Man Eater PB 1200 series a step further. This head features 497cc oval-shaped intake ports that are raised an additional .125'' and utilizes a 2.520'' intake valve. The Man Eater BP PB 1200/1201/1202/1204 series are 100% CNC ported while the PB 1203 series are intake port matched with bowls blended, complete valve job and CNC'd combustion chambers while the intake/exhaust ports are as-cast. The standard features are A-356 virgin aluminum alloy, phosphorous bronze valve guides, and copper valve seats. These heads are machined to accept 1.740'' valve spring cups and can be used in conjunction with the Brodix PM series of intake manifolds.
    PB 1200 series heads require special pistons, valve covers, head studs, shaft mounted rocker arms, and intake manifold.
    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. 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 copper valve seats installed. Sold Individually, 1/pkg. !

      VALVE SPRING   Specs
      1.645'' Diameter Valve Spring for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 945 lbs.
  • Spring Pressure Closed: 330 lbs.
  • Installed Height: 2.100''
  • Max Lift: .875''