Chevy 350 68cc 217cc INTAKE RUNNER FULL CNC INTAKE PORT, CNC EXHAUST PORT ,CNC CHAMBER Complete Aluminum Cylinder Heads


Quick Overview

Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 68 cc
CNC-Machined Combustion Chamber: No
Intake Runner Volume (cc): 217 cc
Exhaust Runner Volume (cc): n/a
CNC-Machined Intake Runner: YES
CNC-Machined Exhaust Runner: YES
Intake Port Shape: Square
Intake Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Location: Standard
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.050 in + 0.100
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.600 in.+ 0.100
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.550 in.
Retainers Included: Yes
Retainer Material: Chromoly steel
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Positive stop
Rocker Arm Studs Included: Yes
Guideplates Included: Yes
Valve Cover Mounting Style: Center & Perimeter Bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 23 deg.
Exhaust Valve Angle: 23 deg.
Valve Guides Included: Yes
Valve Guide Material: Bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold as a pair.

Please allow 3-7 workings days for the Heads to be assembled to ship..

Chevy 350 68cc 217cc INTAKE RUNNER FULL CNC INTAKE PORT, CNC EXHAUST PORT ,CNC CHAMBER Complete  Aluminum Cylinder Heads

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Head Gaskets
The head gasket we recommend for our 23deg. heads used on 327/350/383/400 SBC engines without steam holes is Felpro #1003. On engines using the GM 400 block, or aftermarket blocks with steam holes, use Felpro #1014

Intake Gaskets
Our heads are manufactured with both the conventional intake manifold bolt pattern, and the Vortec bolt pattern. If you're installing a Vortec manifold, use Felpro #1255 gaskets. If you are using a conventional intake manifold, use Felpro #1266 gaskets

Push Rods
Our aluminum 23deg. heads typically use +.100" (longer than stock) push rods, Depending on the components used, it is possible that you may need pushrods shorter or longer than that so we recommend that you use an adjustable pushrod to dial in your rocker geometry and order pushrods to match

Spark Plugs
SBC heads use standard 14mm. x 750" reach, 5/8 hex, gasket seat spark plugs like NGK R5671A-7, Autolite 3924, Champion RC12YC, etc. Remember that higher compression/ boost require a colder heat range spark plug

Exhaust Gaskets
We recommend the use of our Exhaust gaskets # Fel-Pro #1405 on our 23 degree heads.….

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