cylinder heads

SMALL-BLOCK CYLINDER HEADS

Powerful heads prevail

Cylinder heads factory-engineered to deliver performance for small-block engines.

SERVICE REPLACEMENT HEADS

These cylinder heads are direct replacements for OEM heads on 1987 and newer GM Small-Block V-8 engines. Save time and worry by replacing tired or damaged cylinder heads with new ones from Chevrolet Performance.

Service Replacement Head Technical Notes

  • Cast-Iron
  • Use 1.940"/1.500" Valves
  • Straight spark plug design
  • No heat risers provided  

VORTEC CYLINDER HEADS

An easy way to gain 20-40 horsepower on any 1955 and newer Small-Block Chevrolet V-8 (except later-style LT1/LT4 engines with reverse-flow cooling) is by installing a set of Vortec cylinder heads. These value-priced cast-iron cylinder heads use modified combustion chambers and high-velocity port technology to provide improved performance.

VORTEC BOWTIE CYLINDER HEADS

Vortec Bowtie cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance. These upgraded production cylinder heads are ideal for 400-450 horsepower street and racing (great for circle track applications) engines. Vortec Bowtie cylinder heads come with large valves, a thick deck surface and 66-cc combustion chambers. The heads provide outstanding low-lift flow numbers (the more air you flow, the more potential power) and Fast Burn performance all in an affordable, cast-iron head.  

Vortec Bowtie Cylinder Head Technical Notes

  • Cast-iron small runner or large runner cylinder heads* 

  • 66cc combustion chambers 

  • 0.450" deck thickness 

  • Hardened exhaust valve seats 

  • Machined for 2.000"/1.550" valves 

  • Maximum 0.530" valve lift (without modifications)
  • Straight spark plug design
  • No heat risers
  • Drilled and tapped for 7/16"-14 screw-in studs 

  • Dual bolt patterns for Vortec and early style intake manifolds (early model P/N 10051103; Vortec intakes P/N 12366573, 12496820, 12496821, 12496822 or 12489371)
  • Use intake gasket P/N 89017465 for Vortec intakes or dual pattern intake gasket P/N 19301685 for early model intakes or 
Vortec design intake manifolds
  • Dual bolt patterns for perimeter-style and center-bolt valve covers
  • Vortec intake manifold three-step torque specs: 2 lb.-ft.; 
9 lb.-ft.; 11 lb.-ft. 


ALUMINUM FAST-BURN HEADS

Chevrolet Performance’s Fast-Burn 23-degree cylinder heads deliver maximum performance for Small-Block engines. An aluminum head casting – distinguished by Chevy Bowtie logos at each end – and a valvetrain with high-rpm, LS-style beehive-type valve springs stretches the performance range of the heads to enable greater power at a higher rpm. Fast Burn technology delivers more horsepower by increasing cylinder pressures, which maximizes the air/fuel mixture’s combustion. The 62cc combustion chamber is designed for use with flat-top pistons.

ALUMINUM RACING CYLINDER HEADS

Technology bred to help decades of professional drag racers and stock car racers win races is available for you to use in your race car. The Chevrolet Performance Aluminum Racing Cylinder Heads are part of an extensive family of high-performance inline-valve heads, designed specifically for race-winning engines.  

Aluminum Racing Cylinder Heads Technical Notes

  • Made of 355-T7 aluminum
  • Extra-thick decks for angle milling or heavy at milling 

  • Extra port material for professional porting 

  • Recommended for use with 4.000" to 4.155" cylinder bores
  • Revised location angled spark plugs (14mm, 5/8" hex, 3/4" reach, gasketed plugs) 

  • Raised and revised location intake and exhaust ports for 
superior air ow above 0.600" valve lift
  • Modified valve angles (not production 23°) 

  • Longer-than-stock valves required 

  • Designed for aftermarket shaft-mount rocker systems 

  • Perimeter-bolt-pattern-type valve covers required 

  • Specific 18°/15° intake manifold bolt patterns 

  • Recommended intake manifolds: P/N 24502481 or 
24502653 (with valley plate P/N 24502654)
  • Intake manifold gasket P/N 10185007

SPLAYED-VALVE ALUMINUM RACE CYLINDER HEADS

Chevrolet Performance Splayed-Valve Aluminum Race Cylinder Heads are extremely aggressive, all-out competition heads and not intended for street use. Splayed valves point both intake and exhaust valves at the center of the cylinder bore. As the valves open, they move away from the edges of the bore. That allows maximum-size valves to be installed without increasing bore size.

Splayed-Valve Aluminum Race Cylinder Heads Technical Notes

  • Made of 355-T7 aluminum

  • No valve seats or guides provided

  • Extra-thick decks for angle milling or heavy flat milling
  • Extra port material (0.240") for professional porting
  • Completely revised intake and exhaust ports provide ultimate air flow potential

  • 45cc “as-cast” combustion chambers
Modified valve angles (16° x 4° intake, and 11° x 4° exhaust)
  • Designed for longer-than-stock 2.200" and 1.650" valves
  • Valve spring pads accommodate 1.625" diameter springs Revised location angled spark plugs (14mm, 5/8" hex, 3/4" reach, gasketed plugs)

  • Designed for aftermarket shaft-mount rocker systems
  • Custom-fabricated intake manifold required

  • P/N 10185042 intake manifold gasket required

  • Valve cover gaskets P/N 10185043 required  

SB2.2 RACE CYLINDER HEADS

The Chevrolet Performance SB2.2 racing head was designed to improve durability, simplify preparation procedures, and reduce the overall cost of building and maintaining a Small-Block Chevrolet racing engine.

SB2.2 Stock Car Race Cylinder Heads Technical Notes

  • 355-T7 X-rayed and “hipped”* aluminum competition cylinder heads 

  • Extra-thick decks for heavy at milling 

  • Extra material around ports for professional porting 

  • Combustion chambers are very small, shallow and wedge shaped 

  • Precision T-washers installed in all four center head bolt bosses 

  • Designed for longer-than-stock 2.150" and 1.625" valves 

  • Valve spring pads accommodate 1.625” diameter springs 

  • Modified valve angles, 11° x 4° intake and 8° x 0° exhaust 

  • Designed for aftermarket shaft-mount rocker systems 

  • Revised location angled spark plugs (14mm, 5/8" hex, 3/4" reach, gasketed plugs) 

  • Requires specific left- and right-hand pistons 

  • Valve cover P/N 12480006 

  • Replacement AN -08 intake port plugs available as 
P/N 12480171  

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

  • With 5.3L EcoTec3 V8 engine. Based on GM Large SUV segment and EPA-estimated MPG highway: 23 (2WD), 22 (4WD).

  • Dependability based on longevity: 1987 – July 2017 full-size pickup registrations.

  • EPA-estimated MPG city/highway: Sonic with 1.8L engine and 5-speed manual transmission 26/35; with 1.8L engine and 6-speed automatic transmission 25/34; with 1.4L engine and 6-speed manual transmission 28/37; with 1.4L engine and 6-speed automatic transmission 27/35.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

  • MyLink functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.

  • Do not use summer-only tires in winter conditions, as it would adversely affect vehicle safety, performance and durability. Use only GM-approved tire and wheel combinations. Unapproved combinations may change the vehicle’s performance characteristics. For important tire and wheel information, go to my.chevrolet.com/learn/tires or see your dealer.

  • With rear seats folded. Cargo and load capacity limited by weight and distribution

  • EPA-estimated 29 MPG city/39 highway with 5-speed manual transmission and 30 MPG city/38 highway with available Continuously Variable Transmission

  • EPA-estimated 29 MPG city/38 highway with 5-speed manual transmission and 30 MPG city/38 highway with available Continuously Variable Transmission.

  • EPA estimated with 3.6L V6 engine.

  • Cargo and load capacity limited by weight and distribution.

  • EPA estimated with 3.6L V6 engine

  • Chevrolet Infotainment System functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.

  • Vehicle user interface is a product of Apple and its terms and privacy statements apply. Requires compatible iPhone and data plan rates apply. Apple CarPlay, Siri, iPhone and iTunes are trademarks for Apple Inc, registered in the U.S. and other countries.

  • Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner’s Manual for more information.

  • EPA estimate for Sonic with available 6-speed automatic transmission.

  • With rear seats folded. Cargo and load capacity limited by weight and distribution.

  • Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See your vehicle Owner’s Manual for more information.

  • Connected Services include navigation services and Remote Access Plan, and 1 month/3 GB of 4G LTE data (whichever comes first) from vehicle delivery date. Services are subject to User Terms and limitations. Certain services require working electrical system, cell service and GPS signals. OnStar links to emergency services. Visit onstar.com for more details.

  • Model year 2018 and newer vehicles include: 1 month of OnStar Safety & Security Plan and 1 month of Chevrolet Connected Services which include navigation services, Remote Access Plan and 1 month or 3 gigabytes of 4G LTE data (whichever comes first) from vehicle delivery date. Services are subject to user terms and limitations. Visit onstar.com for more details. Data plans offered by AT&T. Availability subject to change.

  • Connected Services include navigation services and Remote Access Plan, and 1 month/3 GB of 4G LTE data (whichever comes first) from vehicle delivery date. Data plan offered by AT&T. Services subject to user terms and limitations. Certain services require working electrical system, cell service, and GPS signal. OnStar links to emergency services.  Visit onstar.com for more details.

  • If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. To cancel you must call SiriusXM at 1-866-635-2349. See SiriusXM Customer Agreement for complete terms at siriusxm.com. All fees and programming subject to change. Sirius, XM, SiriusXM and all related marks and logos are trademarks of Sirius XM Radio Inc.

  • With rear seats folded. Cargo and load capacity limited by weight and distribution.

  • Requires available Performance Exhaust or Z51 Performance Package.

  • Requires available Performance Exhaust or Z51 Performance Package.

  • If you decide to continue service after your trial, your selected subscription plan will automatically renew thereafter. You will be charged at then-current rates. Fees and taxes apply. To cancel you must call SiriusXM at 1-866-635-2349. See SiriusXM Customer Agreement for complete terms at siriusxm.com. All fees and programming subject to change. ©2018 Sirius XM Radio Inc. All rights reserved.

  • Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • EPA-estimated 28 City/39 Hwy MPG

  • With second row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

  • Read the vehicles Owner’s Manual for more important feature limitations and information.

  • Does not detect people or items. Always check rear seat before exiting.

  • Vehicle user interface is a product of Google and its terms and privacy statements apply. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android 5.0 Lollipop or higher. Data plan rates apply. Android, Android Auto, Google, Google Play and other marks are trademarks of Google LLC.

  • Service varies with conditions and location. Requires active OnStar service and paid AT&T data plan. Visit onstar.com for details and limitations.

  • Premier shown seats seven. Standard on L, LS. Available on LT.

  • EPA-estimated 18 MPG city/ 27 MPG highway 3.6FWD.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • EPA-estimated 18 MPG city/ 27 MPG highway 3.6FWD.

  • Read the vehicle owner's manual for important feature limitations and information.

  • The system wirelessly charges one PMA- or Qi-compatible mobile device. Some devices require an adaptor or back cover. To check for phone or other device compatibility, visit my.chevrolet.com/learn for details.

  • EPA-estimated 25 MPG city/31 highway (FWD models).

  • With rear seats folded. Cargo and load capacity limited by weight and distribution.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • With 5.3L EcoTec 3 engine. EPA-estimated MPG city/highway: Suburban 2WD 15/22, 4WD14/21.

  • Based on GM Large SUV segment. With 5.3L EcoTec 3 engine. EPA-estimated MPG city/highway: Tahoe 2WD 15/22, 4WD 15/21.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • Read the vehicles Owner's Manual for more important feature limitations and information.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.