GM C5R Bare Engine Block

  • Sale
  • Regular price $9,095.95

This is the legendary C5R GM Race block that has powered countless wins in IMSA and ALMS with the factory C5R and C6R race cars.  Designed and tested to take the most abuse of any of the GM LS blocks with factory dowel located steel main caps and T6 aluminum as the casting material.



4.117" unfinished bore size (4.160" max)
356-T6 Aluminum block
Designed for 4.100" max stroke
Deep-Skirt Casting
6-Bolt 8620 Steel Dowel located Cross-bolted Main Caps
Strong and Lightweight Aluminum Alloy Casting
Siamesed water jackets
100% CMM measured
Provisions for the latest in Engine Control Management
  • 9.240" Standard Deck Height
  • 2.560" Standard LS Crankshaft Journal Diameter
  • Included 4340 Head Stud kit
  • AN O-ring plugs
  • Wet or Dry Sump Oiling
  • Plug and dowel kit sold separately
  • Does not include cam bearings
  • Does not include front, rear or valley cover

    *Limited availability