Engine Block Accessories

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)

GM LS Oil Galley Plug (12639250) Like GM #12639250

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

LSX Finned Lifter Valley Cover - Black  

LSX Finned Lifter Valley Cover This LS6 Valley Cover eliminates the two rear valve cover PCV hose connections as well as the PCV hose and PCV valve. Improves crankcase ventilation and decreases the quantity of oil and contaminants that make it into the...

Dart Iron LS Next Main Stud Kit 66311010  

ARP Main Studs for WP Warhawk LS Aluminum Block 134-5802 ARP has been the leading manufacturer of performance automotive fasteners since 1968. From it's beginning, ARP has grown to be exceptionally self-reliant and controls all aspects of the...

ARP Main Studs for GM Gen V LT1/LT4 234-5802 ARP has been the leading manufacturer of performance automotive fasteners since 1968. From it's beginning, ARP has grown to be exceptionally self-reliant and controls all aspects of the manufacturing process...

Billet Main Caps for GM LSX Block by Pro-Gram Engineering Made in USA! With the influx of lesser quality goods and materials to the US, Pro-Gram Engineering solely uses materials certified as produced in the US. This helps guarantee the quality of...

Billet Main Caps for LS1 by Pro-Gram Engineering Made in USA! With the influx of lesser quality goods and materials to the US, Pro-Gram Engineering solely uses materials certified as produced in the US. This helps guarantee the quality of the...