Big Duke BP PB 1803 Series Cylinder Head
• CNC Ported
• 410cc Oval Intake Ports
• 95cc Combustion Chambers
• 2.450'' Intake / 1.860'' Exhaust Valve Sizes
• Bare, 1/pkg.
  
  

  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: 410cc - Oval Port
• Combustion Chamber Volume: 95cc
• Valve Sizes: 2.450' Intake / 1.860' 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 MG 2013 (p/n 158-MG2013)
• 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: Fel-Pro p/n 375-1412 or Cometic p/n 245-C5418
• Head Studs: ARP p/n 070-235-4712 (12-point)
• Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
• Valve Angle: 18° and 4° Intake, 9° 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 3036, Jesel KPS 22797
• Lifters: Standard
• Pistons: 18° x 9° 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 1803 (p/n 158-PM1803) / PM 1813 (p/n 158-PM1813) / PM 1903 (p/n 158-PM1903) / PM 1913 (p/n 158-PM1913)

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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