Engine - GM Performance Short Block Engines - Small Bore Cast Iron V8 Racing Block

From GM Performance - This Bow Tie bare block is intended for serious competition applications right out of the box. This block is CNC machined from a raw casting P/N 10051182. All traditional racing modifications are provided by the factory. The heart of this block starts with a non-siamesed cylinder case raw casting P/N 10051182 at a 3.875 inch bore, but can be bored to 4.030 inch.