Big Bore, Sleeved, Aluminum LT Engine Block Shopify Collective Also included is Holley EFI's

Also included is Holley EFI's industry-leading

This short block is a good choice to replace or upgrade that tired stock 5

Maximum Air Flow

Our Street-Strip Series 454 short block has all the ingredients to pack the punch you're after

Big Bore, Sleeved, Aluminum LT Engine Block Shopify Collective Also included is Holley EFI'sBoostline Performance proudly introduces our premium line of aluminum GM engine blocks precision engineered for serious performance builders who demand reliability under extreme conditions. Each block starts with a seasoned GM engine block, then undergoes our proprietary machining process on state of the art Rottler CNC equipment. These blocks get fully machined for Darton sleeves at our facility using seasoned GM engine blocks on our Rottler CNC