ARP 1546402 High Performance Wave-Loc Connecting Rod Bolt Kit Connecting rod bolts are the most important fasteners in your engine, the key to the entire rotating assembly; replacing inferior OEM fasteners can help you avoid catastrophic engine failure Exclusive Wave-Loc design is far superior to standard knurls Manufactured from a heat-treated premium grade 8740 alloy chrome moly steel Rated in the 200,000 psi range, which is considerably stronger than OEM or even Grade 8 hardware Complete set includes the bolts you need to upgrade all of the connecting rods in your engine