ARP High Performance Series Main Bolt Kit - SB Chevy - 4-Bolt Main CHOPCSM Inserts feature a step to

Inserts feature a step to simply drop into spacers and have sizes engraved on each insert for easy identification

Balance Plate

1-3/4 in Diameter

Carburetor Work Stand

This allows racers to reliably increase boost and advance ignition timing-without using high-octane racing fuel-for power gains of up to 20%

ARP High Performance Series Main Bolt Kit - SB Chevy - 4-Bolt Main CHOPCSM Inserts feature a step toHigh Performance Series Main Bolts reduced wrenching hex head and wide are flange evenly distribute the load during torquing. Complete with hardened, parallel ground washers. 170, 000 psi tensile strength. ARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1,