The BB-2 head is recommended for use on 427-509 engines with a minimum of 12:1 com-pression. It features ductile iron valve seats, bronze valve guides and accepts standard valve train components. Sold individually.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Aluminum
- Intake Port Shape:
- Rectangle
- Intake Valve Diameter (in):
- 2.300 in.
- Cylinder Head Finish:
- Natural
- Combustion Chamber Volume (cc):
- 119
- CNC-Machined Combustion Chamber:
- No
- Intake Runner Volume (cc):
- 365cc
- Exhaust Runner Volume (cc):
- N/A
- CNC-Machined Intake Runner:
- No
- CNC-Machined Exhaust Runner:
- No
- Intake Port Location:
- Standard
- Exhaust Port Shape:
- Round
- Exhaust Port Location:
- Raised
- Spark Plug Style:
- Angle
- Intake Valves Included:
- Yes
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in):
- 1.880 in.
- Valve Springs Included:
- Yes
- Maximum Valve Lift (in):
- 0.700 in.
- Outside Diameter of Outer Spring (in):
- 1.550 in.
- Damper Spring Included:
- Yes
- Number of Springs Per Valve:
- Dual
- Retainers Included:
- Yes
- Retainer Material:
- Steel
- Locks Included:
- Yes
- Lock Style:
- 10 degree
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- N/A
- Rocker Arm Studs Included:
- Yes
- Rocker Arm Nut Thread Size:
- 7/16-20 in.
- Rocker Arms Included:
- No
- Rocker Arm Nuts Included:
- No
- Guideplates Included:
- Yes
- Guideplate Pushrod Size:
- 3/8 in.
- Valve Cover Mounting Style:
- Perimeter bolt
- Accessory Bolt Holes Drilled:
- Yes
- Intake Valve Angle:
- 26/4
- Exhaust Valve Angle:
- 17/4
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Phosphorous bronze
- Valve Seats Machined:
- Yes
- Valve Seat Machine Style:
- 5-angle
- Valve Seat Material:
- Ductile iron
- Steam Holes Drilled:
- No
- Oiling Style:
- Through pushrod
- Machined for O-Ring:
- No
- Heat Crossover:
- No
- Quantity:
- Sold individually.
- Make:
- Chevrolet
- Engine Family:
- Chevy big block Mark IV
- Engine Sizes:
- 6.5L/396-7.4L/454
- Years:
- 1966-1990
- Engine Family:
- Chevy big block Gen V
- Years:
- 1991-1995
- Engine Family:
- Chevy big block Gen VI
- Years:
- 1996-2000
