SMALL-BLOCK ALUMINUM RACE BLOCKS

10134400

400 ALUMINUM BARE BLOCK

  • A-356 aluminum competition block
  • CNC-machined
  • Siamesed bores with increased wall thickness
  • 4/117” rough-finished bore
  • 4.135” maximum bore  
  • 3.750” maximum stroke 
  • Splayed 4-bolt steel mains 
  • 400 main size 
  • Dry-sump use only 
  • Tested to 800-horsepower   

24502495

400 ALUMINUM TALL-DECK BARE BLOCK

  • A-356 aluminum competition block
  • CNC-machined
  • Siamesed bores with increased wall thickness
  • 4.117” rough-finished bore
  • 4.135” maximum bore
  • 4.125” maximum stroke
  • Splayed 4-bolt steel mains 
  • 400 main size
  • Dry-sump use only 
  • Tested to 800-horsepower   

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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.