Racing Flag

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

Racing Flag

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

SMALL-BLOCK CHEVROLET PERFORMANCE RACE BLOCKS

24502503

350 CAST-IRON BOWTIE RACE BLOCK

  • Cast-iron competition block right out of the box
  • 4-bolt steel mains, 20° splayed caps on center three mains
  • 2.000” O.D. cam bearings (1.867” I.D.) required at all five locations
  • 3.980” finished bore
  • 4.155” max bore (siamesed cylinder bores)
  • 9.025” deck height
  • Oil galleries for dry-sump system are oversized and tapped for pipe plugs
  • Supplied with sonic data sheet
  • Tested to over 700-horsepower  

24502650

283 MAIN, 350 BORE SIZE SHORT-DECK BOWTIE RACE BLOCK

  • CNC cast-iron competition block designed for drag racing, road racing, or restricted oval track racing
  • 4-bolt steel mains, 20° splayed caps on center three mains
  • 8.325” deck (standard-deck blocks are 9.025”); can be machined to 8.220” deck height
  • Camshaft is raised 0.422” to 4.955”
  • Cam bearing bores machined for 2.250” O.D. X 1.875 roller bearings
  • 3.980” rough bore
  • 4.185” max bore (minimum of .250 cylinder bore wall thickness)
  • Integral oil restrictors  
  • Must use Big-Block water pump, must raise water pump with adapters for balancers larger than 6”
  • Oldsmobile Aurora V-8 bell housing bolt pattern (12.24” max flywheel diameter) 
  • Lifter holes and cylinder head bolt holes are not drilled
  • Will accept standard, SB2.2 and splayed valve lifter patterns
  • Can be machined to accept any Small-Block Chevy cylinder head 
  • Shorter-than-production pushrods required
  • Tested to 800-horsepower
  • Water jacket core plugs are 1.5” press-in 
  • Oil galley plugs are AN O-ring style   

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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.