Call Our Support Line
24 Hours / 7 Days a Week!  
Same Day Shipping Before 11 PM ET
My Cart
Shop By Vehicle
Shop By
Close Menu
Shop By Vehicle
Top Categories
All Categories

Top Categories

All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates

Chevrolet Performance 12480129

SB2.2 NASCAR Aluminum Cylinder Head Reduced .375" Guide Holes

Chevrolet Performance 12480129
Chevrolet Performance® Block and Heads Rebate
Expires on March 1, 2018

Purchase a Chevrolet Performance gasoline engine block or two cylinder heads and get a up to $100 Chevrolet Performance Visa Prepaid Card!

View All Chevrolet Performance Engines


jegs shipping
FREE Shipping
Estimated ship date 01/26/18 if Ordered Today
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
Please login to receive private and specific offers Click Here
Chevrolet Performance 12480129 SB2.2 NASCAR Aluminum Cylinder Head Reduced .375" Guide Holes $2,209.35
SB2.2 NASCAR Aluminum Cylinder Head
  • Reduced .375'' Guide Holes
  • Bare (No seats or guides installed)

  • Specifications:

    Manufacturer's Part Number:

    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.

  • 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

  • Specific left-hand and right-hand pistons
  • Valve Covers #809-12480006 or #809-12480012

  • Items You Need
    *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.

    Before you leave us... Receive a free catalog or join our email list

    Sign up to receive our catalog or subscribe to our email list now to see our exclusive email only specials, new products, and offers!

    Request CatalogJoin Email List