BBC 315 CNC Bare Cylinder Head

MaterialA356 Aluminum

Intake Port Volume315cc

Intake Port Dimension2.450"H x 1.755"W x 13/32 Radius

Intake Port LocationStock

Exhaust Port Volume135cc

Exhaust Port Dimension1.780"H x 2.025" W

Intake Valve Diameter (in):2.25 in.

Exhaust Valve Diameter (in):1.880 in.

Combustion Chamber Size121cc

Valve Springs  Pocket I.D.1.735"

Maximum Valve Lift (in):0.750 in.

Outside Diameter of Outer Spring (in):1.625 in.

Lock Style:10 degree

Rocker Arm Nut Thread Size:7/16-20 in.

Valve Cover Mounting Style:Perimeter bolt

Intake Valve Angle:24/4

Exhaust Valve Angle:15/4

Valve Guide Material:Manganese Bronze

Intake Valve Seat Machine Style:5-angle

Valve Seat Material:Mental powder

Oiling Style:Through pushrod

Recommended Components:

Intake Port Gasket (.120" Thick)

Intake Port Gasket(.060" Thick)

Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.

Exhaust Port GasketHead Gasket, Fel-Pro #1047 (Mark V and VI),Head Gasket,, Fel-Pro #1017-1 (Mark IV)Head Bolts, 7/16"-14 x 7/16"-14 ARP 235-7202ARP 135-3703 (Mark IV), ARP 135-3707 (Mark V),ARP 235-4713Head Bolt Washers, Manley

Stud Girdle7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry)
1.7 Shaft Mount Rocker Arms T&D

Suggested ManifoldVictor Jr,Super Victor

Spark Plug Starting RangePump Gas 3924 / Race Gas 3922





11/32" Intake Valve, 2.250" x5.500" O.A.L


11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L


 Racing Spring #1224 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600

10°  Retainers 1.490" O.D x 1.180" I.D x .765" I.D


10° 11/32" Valve Locks with lashcap recess


ARP 7/16" Rocker Exhaust Studs


ARP 7/16" Rocker Intake Studs


3/8" Guide Plates


11/32" Viton Valve Seals


Hardened Spring Cup 1.740" O.D / 1.650" I.D


11/32" Intake Manganese Bronze Valve Guides .502" O.D x 2.10" O.A.L


11/32" Exhaust Maganese Bronze Valve Guides .502" O.D x 2.25" O.A.L

We also supply the following models