Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
Click for more details.

Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
Click for more details.

LS/LT/LSX PRODUCTION CYLINDER BLOCKS

19420904

L8T GEN-V 6.6L CAST-IRON BLOCK 

  • Direct replacement for 2020 and later L8T 6.6L gas engines used in Silverado HD trucks
  • Production cast-iron casting finished with 4.065’’ (103.25 mm) cylinder bores
  • Used with a 3.86’’ stroke crankshaft in production engines to produce 400 cu in. (6.6L) displacement — the largest displacement in the LT engine family
  • 9.240’’ deck height
  • Delivered bare with regular-production six-bolt main caps
  • Regular-production oiling circuit
  • Includes provisions for direct fuel injection

12609999

GEN IV 6.0L CAST-IRON BLOCK

  • Direct replacement for LY6 and L96 production engines
  • Production cast-iron block
  • Production oiling system
  • 6-bolt iron main bearing caps
  • 4.000” bore
  • 9.240” deck height
  • No provision for Active Fuel Management
  • Supports 500+ horsepower

12602691

LS2 ALUMINUM 6.0L BARE BLOCK

  • Direct replacement for 2005-2008 LS2 Corvette, SSR, GTo 6.0L, and TrailBlazer SS
  • Production 319-T5 aluminum block with iron sleeves
  • Production oiling system
  • Forged powdered metal 6-bolt main bearing caps
  • 9.240” deck height
  • Use only LS1, LS6, LS2, or L92/LS3-style cylinder heads
  • 4.000” finished bore (101.6 mm) Provisions for Active Fuel Management
  • Great for stoker cranks for even more cubes
  • Tested to 450+ horsepower

12623967

LS3/L92 ALUMINUM 6.2L BARE BLOCK

  • Direct replacement for:
                2009-2012 L9H
                2010-2012 L94
                2008-2013 LS3
                2010-2013 L99
                2007-2008 L92
  • Production aluminum block with iron sleeves
  • Production oiling system
  • Use only LS1, LS6, LS2, or L92/LS3-style cylinder heads
  • 4.065” finished bore (103.25 mm)
  • Provisions for Active Fuel Management
  • Great for stroker cranks for even more cubes
  • Tested to 500+ horsepower
  • Forged powdered metal 6-bolt main bearing caps
  • 9.240” deck height

12673476

LSA 6.2L BARE BLOCK

  • Direct replacement for 2009-2012 Cadillac CTS-V 6.2L supercharged engine and 2012 ZL1 Camaro
  • Production cast-aluminum block with iron sleeves
  • Production oiling system
  • 6-bolt iron main bearing caps
  • 9.240” deck height
  • Not for use with LS7 or LSX-LS7 heads
  • 4.065” finished bore (103.25mm)
  • Includes oil squirters (8) for piston cooling
  • No provision for Active Fuel Management
  • Rated for 550+ horsepower

12623969

LS9 6.2L BARE BLOCK

  • Direct replacement for 2009-2012 Corvette ZR1 6.2L supercharged engine
  • Production cast-aluminum block with iron sleeves
  • Deck plate-honed
  • Production oiling system
  • 6-bolt steel main bearing caps with dowel pins
  • 9.240” deck height
  • Not for use with LS7 or LSX/LS7 heads
  • 4.065” finished bore (103.25 mm)
  • Includes oil squirters (8) for piston cooling
  • No provision for Active Fuel Management
  • Rated for 635+ horsepower  

19213580

LS7 7.0L CORVETTE BARE BLOCK

  • Direct replacement for 2006-2014 7.0L LS7 engine
  • Production 319-T5 aluminum block with pressed-in iron sleeves
  • Production oiling system
  • 9.240” deck height
  • For use with any LS or LSX series head
  • 4.125” finished bore (104.78 mm), deck plate-honed
  • Siamese cylinder bores for large bore size
  • No provision for Active Fuel Management
  • Based on C5R block development
  • Tested to 500+ horsepower

19329617

LT1/LT4 ALUMINUM 6.2L BARE BLOCK

  • Direct replacement for 2014-2015 Stingray LT1
  • Production aluminum block with iron sleeves
  • Production oiling system
  • 9.240” deck height
  • Nodular iron 6-bolt main bearing caps
  • Use only with LT1-style cylinder heads
  • 4.065” finished bore (103.25 mm)
  • Provisions for Active Fuel Management
  • Provision for direct fuel injection

12480030

ALUMINUM C5R RACING BLOCK

The ultimate GM aluminum LS block, the C5R was originally designed for Chevrolet’s factory-backed Corvette Racing program. It was developed to support more than 440 cubic inches and up to 900 horsepower – and has proven itself by powering Corvette team to endurance racing wins. This is a non-production, purpose-built cylinder block manufactured with proprietary materials and machined to the highest tolerances – and using premium, racing-spec hardware. If you’re looking for the ultimate aluminum cylinder block to support your horsepower desires, the race-proven C5R is it!

  • Premium “hipped” and X-rayed 356-T6M aluminum-alloy block casting
  • 9.240” deck height
  • Production-style oiling system
  • 6-bolt dowel-located steel main bearing caps
  • 4340 premium main cap fasteners
  • For use with any LS or LSX series head
  • Unique cylinder liner material for maximum durability
  • Siamesed cylinders to support larger bores
  • 4.117” finished bore
  • 4.160” maximum bore
  • Fully blueprinted and squared
  • Production camshaft location and cam bores
  • Includes premium head studs
  • Anodized aluminum O-ring core plugs
  • No Active Fuel Management provisions

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Visit www.chevroletperformance.com/emissions for more details.

  • CHEVROLET PERFORMANCE PARTS COMPLIANCE WITH EMISSIONS STANDARDS

    Motor vehicle emissions standards are intended to help achieve and maintain air quality goals that benefit human health and the environment. U.S. federal and state and Canadian law prohibits knowingly removing, modifying, or making inoperative, or causing someone to remove or render inoperative, or otherwise tampering with, any part or element of design installed in compliance with motor vehicle emission standards on a motor vehicle or nonroad vehicle, or otherwise modifying any required emission and noise control system. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet emissions laws and regulations and should not be operated on public roads or used for any other use. This part is intended primarily for use in vehicles that are NOT:

    (1) “motor vehicles” designed for street use; or

    (2) off-road vehicles used for anything but competition.

    U.S. federal and state, and Canadian provincial agencies have the authority to administer substantial monetary penalties against individuals and companies who do not comply with these laws. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance Parts complies with applicable federal, state/provincial and local laws, regulations and ordinances, and for ensuring that modified vehicles are operated in a manner that complies with applicable laws. In an effort to help consumers maintain compliance with emissions regulations, the product descriptions for many parts include emissions-related warnings and notices. This page summarizes the emissions-related information that you may see on this website.

    PARTS INTENDED FOR COMPETITION USE ONLY

    Chevrolet Performance offers parts that are intended exclusively for use in competition vehicles that will only be driven on a track or off-road course. By “competition vehicles,” GM means vehicles (i) used exclusively for competitions organized and sanctioned by a local or private body and (ii) not designed for use on public streets or highways. Consumers are strongly advised not to install parts accompanied by this warning on vehicles that will be driven on public roads, as they are not designed for that purpose. The product descriptions for such parts are accompanied by the “Checkered Flag” warning icon.

    WARNING: NOT EMISSIONS LEGAL FOR STREET USE

    Because of their effect on a vehicle’s emissions performance, certain parts are intended exclusively for use in competition vehicles. The “Checkered Flag” warning icon means a part is designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Installation or use of this part on a vehicle operated on public streets or highways is likely to violate U.S., Canadian, and state and provincial laws and regulations relating to motor vehicle emissions.

  • The Manufacturer's Suggested Retail Price excludes tax, shipping and installation. Individual retailer pricing may vary. Please see your local dealer or retailer for details.