- Engines & Components
- Cylinder Heads
- Chevrolet Performance SB2.2 NASCAR Aluminum Cylinder Heads
Chevrolet Performance SB2.2 NASCAR Aluminum Cylinder Heads improve durability, simplify preparation, and lower the cost of building/maintaining a competitive small block race engine. "Mirror" intake ports are all angled toward the center of the engine, making these heads perfect for single 4-barrel applications. The spark plug holes were moved for greater combustion efficiency, and 48cc chambers can produce 12.1:1 compression with standard flat-top pistons.
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Features- Sold individually
- HIP-treated* aluminum heads
- Extra-thick deck for heavy flat milling
- Extra port material for custom porting
- Intake/Exhaust Ports: "As-Cast" Peanut
- Valve spring pads accommodate 1.625" springs
- T-washers installed in all four center head bolt bosses
- Replacement -8AN intake port plugs available #809-12480171
- Revised spark plug location for angled 14mm, 5/8" hex, 3/4" reach, gasket seat plugs
- Designed for longer-than-stock 2.150"/1.625" valves and aftermarket shaft-mounted rocker arms
- 4.400" Bore Spacing: 48cc "As-Cast" Combustion Chambers and 11° x 4° Intake, 8° x 0° Exhaust Valve Angles
- 4.500" Bore Spacing: 28cc "As-Cast" Combustion Chambers and 11° x 4° Intake, 7° x 2° Exhaust Valve Angles Requirements
- Specific left-hand and right-hand pistons
- Valve Covers #809-12480006 or #809-12480012
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Combustion Chamber Volume
Exhaust Valve Diameter
Intake Valve Diameter
Intake Runner Volume cc
Valve Angle deg
Casting Number
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Head Casting Number
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Standard 4.400" Bore Spacing
Chevrolet Performance 12480129
Chevrolet Performance SB2.2 NASCAR Aluminum Cylinder Head Reduced .375" Guide Holes
$2,932.33
Ships on 09/27/24
FREE Shipping
Lowest Price Guarantee
Chevrolet Performance 12480011
Chevrolet Performance SB2.2 NASCAR Aluminum Cylinder Head Standard .500" Guide Holes
$2,693.66
Ships on 09/27/24
FREE Shipping
Lowest Price Guarantee