These Manley Chevy Small Block LS Series 6.125in H Beam Connecting Rods are a must - have for racing enthusiasts and engine rebuilders. They're perfect for high - performance racing on the track or for those looking to upgrade their engine's performance. The rods are 6.125 inches long and offer the flexibility of choosing between ARP 8740 or ARP 2000 bolts to suit your engine setup.