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Brodix 1318003

BP AK 285 Series Cylinder Heads Lightened

Brodix 1318003
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158-1318003

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Estimated ship date 08/24/17 if Ordered Today
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Brodix 1318003 BP AK 285 Series Cylinder Heads Lightened $3,172.10
BP AK 285 Series Cylinder Heads
  • Lightened
  • CNC Ported
  • 285cc Intake Ports
  • 52cc Combustion Chambers
  • 2.180'' Intake / 1.600'' Exhaust Valve Sizes
  • Angle Plug
  • Bare, 2/pkg.

  • Brodix 1318003 Details

    BP AK 285 Series Cylinder Heads

  • 285cc Intake Ports
  • 52cc Combustion Chambers
  • 100% CNC Ported
  • Lightened = Machined to reduce overall weight of this cylinder head.

    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 studs, valves, springs retainers or locks.

    Cylinder Head Specifications
  • Intake Port Volume: 285cc
  • Combustion Chamber Volume: 52cc
  • Valve Sizes: 2.180'' Intake / 1.600'' Exhaust ( 5/16'' Stem Diameter )
  • Spark Plug Configuration: Angled

    Facts and Related Components
  • Torque Heads: 70 ft-lb.
  • Torque Rocker Studs: 40-45 ft-lb.
  • Intake Gasket: O-Ringed
  • Head Gasket: Fel-Pro p/n 375-1003 (350ci) / 375-1004 (400ci) or Cometic p/n 245-C5399 (350ci) / 245-C5403 (400ci)
  • Exhaust Gasket: Brodix p/n 158-MG52464 (Trim to fit), Cometic p/n 245-C5424 (Spread Port)
  • Head Studs: Available from Brodix - Brodix BR HSAP (Aluminum Block)
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat
  • Valve Angle: 13°
  • Angle Milling: N/A
  • Flat Milling: .0060'' per cc
  • Angle Machining: N/A
  • Stud Girdle: N/A
  • Rocker Arms: Shaft System with 80/135 Spacing - T&D 2341, Jesel KPS 20592
  • Lifters: .180'' Offset
  • Pistons: Special 13°
  • Pushrods: Special Length
  • Intake Face Angle: 5°
  • Exhaust Pattern: Spread Port with Stahl Bolt Pattern Header Flange
  • Valve Centerline: 80/135
  • Spring Pockets: 1.550'' Out of the Box, May be cut to 1.625'' - No larger or deeper
  • Accessory Bolt Holes are Drilled
  • Recommended Intake Manifold: Fuel Injection

  • Specifications:

    Manufacturer's Part Number:
    1318003

    Radical Valve Angle & Relocated Spark Plug
    13° Intake & Exhaust Valve Angles

    The Brodix AK series is the latest in sprint car technology. This head offers new features such as: a 13-degree valve angle, a relocated spark plug and down nozzle location, and a 80/135 valve spacing, and a raised valve cover rail. The BP AK head is offered in a couple of intake port sizes, 270cc and 285cc. Special components required for these heads are injectors, sheet metal valve covers, and a shaft rocker system. 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, drilled and tapped holes on the ends for standard drive accessories, phosphorous bronze valve guides and interlocking valve seats installed. Sold in Pairs. !

      VALVE SPRING   Specs
      1.550'' Diameter Valve Spring for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 550 lbs.
  • Spring Pressure Closed: 240 lbs.
  • Installed Height: 1.950''
  • Max Lift: .700''
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