*PAIR* BBC 454 CHEVY Aluminium Cylinder heads. 335cc Runner, 118cc Chamber Big Block Chevy Bare

DRP DETROIT RACING PRODUCTS - Big Block Chevy Cylinder Heads

BBC Heads - Sold as a PAIR.

DETAILS:

• Premium Bronze Valve Guides.
• Hard 355-T6 Aluminium - Race Quality.
• 3 Angle Valve Seats
• Intake Valve size: 2.250"  X 11/32"    (Recommend 5.370"/5.350" length)
• Exhaust Valve size: 1.880" X 11/32"  (Recommend 5.320"/5.350" length)
• Combustion chamber size: 118cc
• Intake Port Volume: 335cc
• Intake Port Dimensions:   1.780" W x 2.500" H
• Intake Port Location    Stock
• Exhaust Port Volume: 148cc
• Exhaust Port Dimension:  1.900" W x 1.660" H
• Exhaust Port Location  .357" Raised
• Combustion Chamber Size(As Cast)
• Valve Angle            24°/4° Int, 15°/4° Exh
• Valve Spring Pocket Diameter   1.750"
• Minimum Bore Diameter          4.550" 
• Flat Mill               .006" per cc/ Maximum 105cc As Cast
• Angle Mill           .009" per cc/Maximum 100cc As Cast
• Valve Spring Installed heights: 
  • ​Intake with 5.370" long & 0.250" tip = 1.900" installed height
  • Exhaust with 5.320" long & 0.250 tip = 1.900" installed height
• Recommended Spark Plugs: 750 reach gasketed 5/8 hex. NGK-BCPR7ES
• Recommended Intake Gaskets: Felpro 1275 (larger) or Felpro 1252-3 
• Recommended Head Bolts:
  • BOLTS:  ARP-135-3603      6 POINT (GEN 4)
  • BOLTS:  ARP-135-3703    12 POINT (GEN 4)
  • BOLTS: ARP-135-3707     12 POINT (GEN 5)
  • STUDS: ARP-235-4713     12 POINT (GEN 4&5)
• Intake Valves to suit:  DRP-5190-8  & Ferrea:  F6190-8
• Exhaust Valves to suit:  DRP-5146-8 & Ferrea: F5146-8 or  F6296