ARP High Performance Series Main Bolt Kit - SB Chevy - 4-Bolt Main 39000609 This results in quicker starts

This results in quicker starts

Features 60K V Rated Alkyd Compound

9/16 in Head

1-1/2" baffled breather tubes for proper crankcase venting

The new Series 2A has new features never seen before in the Head and Neck Restraint market

ARP High Performance Series Main Bolt Kit - SB Chevy - 4-Bolt Main 39000609 This results in quicker startsHigh 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,