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Chevrolet Performance Oval Port Aluminum Cylinder Heads 12363390

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Cylinder Head, Oval Port, Aluminum, Assembled, 110cc Chamber, 290cc Intake Runner, Chevy, 454, Each

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  • Order this item and get free delivery and handling on your entire order! Oversize fees also waived on this item. Valid on orders shipped in the contiguous United States.

Brand: Chevrolet Performance

Manufacturer's Part Number: 12363390

Part Type: Cylinder Heads

Product Line: Chevrolet Performance Oval Port Aluminum Cylinder Heads

Summit Racing Part Number: NAL-12363390

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 110

CNC-Machined Combustion Chamber: No

Intake Runner Volume (cc): 290cc

CNC-Machined Intake Runner: No

CNC-Machined Exhaust Runner: No

Combustion Chamber Style: Semi-open

Intake Port Shape: Oval

Intake Port Location: Standard

Exhaust Port Shape: D-port

Exhaust Port Location: Standard

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): 0.680 in.

Outside Diameter of Outer Spring (in): 1.550 in.

Damper Spring Included: No

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: Umbrella

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.

Accessory Bolt Holes Drilled: Yes

Valve Guides Included: Yes

Valve Guide Material: Bronze

Valve Seats Machined: No

Valve Seat Material: Steel

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Quantity: Sold individually.

In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

Calculator Compression Calculator

These Chevrolet Performance oval port aluminum cylinder heads are fully machined with semi-finished bronze alloy guides and valve seats that use 2.19 in. intake and 1.88 in. exhaust valves. They feature high-velocity 290cc intake runners to enhance midrange throttle response and torque. The exhaust runner volume is 110cc, which will provide a very streetable compression ratio. The valve spring diameter is 1.550 in. with 7/16 in. rocker stud holes. The heads will accept all stock accessory brackets.

Warranty

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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