300cc Bullitt Series Cylinder Heads
• 300cc Intake Ports
• 75cc Combustion Chambers
• 2.300'' Int / 1.760'' Exh Valves
• 1.550'' Dia. Springs
• Hydraulic Roller 175# Seat Pressure
• 10° Steel Retainers
• .250 Raised Exh Port
• Assembled 2/pkg
  
  
  Cylinder Head Specifications
• Material: A356 Aluminum
• Intake Port Volume: 300cc; 2.275' H x 1.850' W x .575 Radius; Stock Location
• Exhaust Port Volume: 142cc; 1.850' H x 1.600' W; .250' Raised Port Location
• Combustion Chamber Volume: 75cc
• Valves: 2.300' dia. x 5.245' o.a.l. Intake / 1.760' dia. x 5.050' o.a.l. Exhaust ( 11/32' Stem Diameter )
• Valve Springs: (PAC Racing) Hydraulic Roller 1.550' Diameter - Closed Pressure: 175 lbs.; Max Lift: .725'
• Spring Retainers: 1.500' O.D. x 1.120' I.D. x 0.705'I.D. - 10° Manley Steel Retainers
• Valve Locks: 10° 11/32' Beadlock with Lash Cap Recess
• Rocker Studs: 7/16' (ARP)
• Guide Plates: 3/8' Adjustable
• Valve Seals: 11/32' Viton
• Hardened Valve Spring I.D. Locator: 1.550' O.D. x 0.780' I.D.
• Intake Valve Seats: 2.450' O.D. x 1.950' I.D. x 0.375' Deep
• Exhaust Valve Seats: 1.900' O.D. x 1.400' I.D. x 0.375' Deep
• Valve Guides: 11/32' Bronze, 0.531' O.D. x 2.250' O.A.L.
• Valve Spring Pocket Diameter: 1.750' O.D.
• Deck Thickness: 0.750'
• Minimum Bore Diameter: 4.360'
  Facts and Related Components
• Intake Gasket: SCE p/n 829-235104
• Head Gasket: (4.500' Bore Gasket) Fel-Pro p/n 375-1018, Cometic p/n 245-C5667-040
• Exhaust Gasket: Fel-Pro p/n 375-1420
• Head Bolts: ARP p/n 070-155-3603
• Head Studs: ARP p/n 070-155-4203 (12-point)
• Head Bolt Washers: AFR p/n 033-6320
• Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
• Valve Angle: 14° Intake / 8° Exhaust
• Pushrod Slots: Standard
• Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
• Stud Girdle: AFR p/n 033-6209
• Rocker Arms: Standard
• Lifters: Standard
• Spring Pockets: May not be cut any larger than 1.750'
• Accessory Bolt Holes are Drilled
• Recommended Intake Manifold: AFR Single Plane 4150 Carb Pad (p/n 033-4992) / 4500 Carb Pad (p/n 033-4993)

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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