Splay Cap Small Block Chevrolets
Stock Bore Space Raised Cam Blocks

2040 n26 adj
The 2040 is the ultimate aluminum splay cap small block Chevrolet. This small block is designed for high horsepower circle and drag racers. The 2040 series utilizes a splay main cap design and features wide pan rails. They are water cooled and have a +.390”, +.629” or 1.029” raised cam position. The 2045 is a heavy duty, dry sump model. The 2040 is a lightened version of the 2045 and is a dry sump model.




  • Premium CN Billet material
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  • CNC machined at CN Blocks
  • Includes block, caps, main studs, and sleeves installed
  • 4.400” Bore Spacing
  • Deck Heights: 9.025”, 9.325”, or 9.500”
  • Optional deck heights: 9.00” to 10.200”
  • SBC 400 crank mains
  • Optional 350 mains
  • Aluminum main caps
  • 1/2” main studs and splay studs
  • +.390”, +.629”, or +1.029” cam height
  • Cam sizes: BBC, 50mm, 55mm, or 60mm
  • Lifter angle to match application
  • Lifter sizes: .842”, .875”, .904”, or .936”
  • Jesel keyway bushings available
  • Distributor available on +.390” high cam only
  • Priority based main oiling
  • Left rear #12 AN oil inlet
  • Standard dry sump
  • Valley oil scavenge
  • Rocket oil pan pattern
  • Dual starter bosses
  • Water cooling

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