Engine Blocks

Chevrolet Performance RTV Engine Sealant 5.3 oz 12378521 Room temperature vulcanizing (RTV) sealant. This high viscosity product cures when exposed to air. The cured material has superior adhesion and elongation properties and is very resistant to...

LSXceleration Gen IV/V DOD Oil Block Off Plugs 54224-8 Set of 8 Gen IV/V DOD Oil Block off plugs. Made in the USA.

RHS LS 9.240" Standard Deck 4.120" Bore Aluminum Race Block 54903U Block Specifications Designed from heavy-duty A357-T6 aluminum material 3.895”-4.165” siamese cast bore walls w/ press-in spun cast iron liner Available in standard (9...

RHS LS 9.750" Tall Deck 4.120" Bore Aluminum Race Block 54901U Block Specifications Designed from heavy-duty A357-T6 aluminum material 4.125”-4.165” siamese cast bore walls w/ press-in spun cast iron liner Available in standard (9...

Chevrolet Performance LSX Rear Cover 19369274 Fits GM LSX Block and Concept Performance LSR Block. Does NOT included bolts or seal/gasket. 

Chevrolet Performance LS Main Cap Fastener Kit Fastener Kit Includes: 10 x #12560273 Outer Main Cap Stud 10 x #12560272 Inner Main Cap Bolt 10 x #12556127 Side Main Cap Bolt 

ARP GM LS Main Cap Side Bolts 671-1002 Main Cap Side Bolts Only (Requires qty 2 per engine)

Chevrolet Performance 6.2L LSA Aluminum Bare Block 12673476 Replacement block for CTS-V and ZL1 Camaro. Features: 319-T5 Aluminum Block with Iron Sleeves Includes Oil Squirters 6-Bolt Main Caps 9.240" Deck Height 4.065" Finished...

GM LS Oil Galley Plug (12573460) Like GM #12573460

Chevrolet Performance Gen III/IV LS Rear Cover 12639250 Will not fit GM LSX or LSR blocks. 

Chevrolet Performance Cam Gear Bolt/Outer Main Cap Bolt 12556127 Use with 3-bolt, non-VVT camshafts and main cap outer bolt

DART SHP LS Next Cast Iron Blocks Darts SHP LS Next Iron Blocks are designed for high performance and medium duty applications. Features Superior strength 220 BHN Cast Iron Steel 4-bolt main caps with upgraded ARP main studs Lifter oil crossover with...