Chevy Big Block 454 Aluminum Heads 119cc Chamber COMPLETE 305cc OVAL Intake Runner

Chevy Big Block 454 Aluminum Heads 119cc Chamber COMPLETE 305cc OVAL Intake Runner

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Quick Overview

Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 119 cc
CNC-Machined Combustion Chamber: No
Intake Runner Volume (cc): 305 cc
Exhaust Runner Volume (cc): n/a
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Intake Port Shape: Oval
Intake Port Location: Standard
Exhaust Port Shape: Rectangular
Exhaust Port Location: Raised
Spark Plug Style: Angle
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.250 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.880 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.550 in.
Outside Diameter of Outer Spring (in): 1.450 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
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 7/16
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Valve Cover Mounting Style: Perimeter Bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 24 deg.
Exhaust Valve Angle: 15 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 assembly before shipping..

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Due to the wide combustion chamber needed to fit around the large 2.250/ 1.880” valves, These gaskets are .041” thick, and fit bore sizes as large as 4.540” on all Mark IV and VI blocks, as well as aftermarket blocks. Felpro 1017 gaskets will also work with these head/ block combos.

Rectangular Port Heads use FelPro 1275 or 1275-5 gasket, depending on the thickness you require.

Our heads require the use of 14mm. x 3/4” reach 5/8” hex gasket seat sparkplugs. Some recommended plugs are; NGK BCPR6ES or R5671A-7, Champion RC12YC, Autolite AR3923 or AR3924. Remember these are for mild street engines. Higher compression or boost requires colder sparkplugs!

Due to the raised (+.625”) exhaust port location on our heads, +.100” longer bolts / studs are needed next to each port. Use our PC2452-6100 head stud Kit. ARP #135-3703 12pt. Head bolts, and #235-4303 Head studs work too. If you already have a standard BBC head stud kit and are just looking for the 8 +.100” studs, use our PC2452-6100-8 or ARP # 235-4306. These heads should be torqued to 65ft.lbs. using high pressure moly lube or 70ft.lbs. using 30wt. oil.

Please consult your fastener manufacturer for their specific recommended torque values.

Our BBC heads utilize a 1.88” x 1.88” square exhaust port. This exhaust port requires specific gaskets. Felpro also offers gaskets that work with our heads as # 1410.

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