BP BR 7 BS 300 Series Cylinder Heads
This BR 7 Cylinder Head is sold as an assembled casting. LS7 300cc cylinder head is CNC finished machined. Assembled BR 7 Cylinder Heads will include valve guides, valve seats, studs, valves, springs retainers, and locks.
Cylinder Head Specifications
- Intake Port Volume: 300cc
- Combustion Chamber Volume: 72cc
- Valves (Diameter x Overall Length: 2.250 in. dia. x 5.450 in. Intake / 1.580 in. dia. x 5.450 in. Exhaust (8 mm Stem Diameter)
- Valve Springs: 1.550 in. Diameter - Open Pressure: 770 lbs.; Closed Pressure: 260 lbs.; Installed Height: 2.155 in.; Max Lift: .800 in.
- Spring Retainers: 10 degree Titanium
- Valve Seals: 8 mm
- Torque Heads: 11 mm STUDS - 85 ft.-lbs. WITH OIL / 8 mm STUDS - 26 ft.-lbs. WITH OIL
- Torque Rocker Studs: 22 ft.-lbs.
- Intake Gasket: Fel-Pro p/n 375-1208-3 (.060), GM p/n 809-19172113
- Head Gasket: Fel-Pro p/n 375-1185-041 (4.175 bore) or GM p/n 809-12582179
- Exhaust Gasket: Fel-Pro p/n 375-1440
- Head Studs: ARP p/n 070-234-4319 (undercut studs)
- Spark Plug Specs: 14 mm Thread, .750 in. (3/4 in.) Reach, Gasket Seat (NGK R5671A)
- Valve Angle: 10 degree
- Flat Milling: .0060 in. per cc
- Dowell Shift: Standard
- Pushrod Slots: Standard
- Rocker Arms: LS7 style
- Lifters: Standard
- Intake Manifold: LS7 or Equivalent
- Valve Centerline: Standard
- Spring Pockets: 1.550 in. out of the box, May not be cut any larger or deeper
- Accessory Bolt Holes are Drilled
Specifications:
Motor Vehicles
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Tools:
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Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.