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Chevrolet Performance SB2.2 NASCAR Aluminum Cylinder Heads


Chevrolet Performance
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.

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



  • 3 Products
    Standard 4.400" Bore Spacing

    809-12480011
    SB2.2 NASCAR Aluminum Cylinder Head
  • Standard .500'' Guide Holes
  • Bare (No seats or guides installed)
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  • $2,254.99
    Order Today Ships 04/30/14

    809-12480129
    SB2.2 NASCAR Aluminum Cylinder Head
  • Reduced .375'' Guide Holes
  • Bare (No seats or guides installed)
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  • $2,516.99
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    R0X 4.500" Bore Spacing

    809-88958667
    R0X SB2.2 NASCAR Aluminum Cylinder Head
  • Fully CNC-machined aluminum race head with cast ports and combustion chambers for professional finishing
    More info on Chevrolet Performance 88958667
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  • $1,959.99
    Order Today Ships 04/30/14

    3 Products


    *HIP stands for Hot Isostatic Pressure. This process puts cylinder heads in a sealed vessel where a vacuum removes room air and any contaminants. The vessel is filled with high-pressure nitrogen (up to 30,000 psi) and then heated to and sustained at the required temperature for a preset length of time. Cooling is also controlled to ensure maximum strength and proper heat treatment. The extreme pressure and heat removes almost 100% of the internal porosities generated during casting. The material integrity, strength, and fatigue life improve significantly.