ARP 660-1013 Metric Thread Bolt Kit M6 x 1.00 x 80 hex black oxide bolts ymm_34 and the difference is perceptible

and the difference is perceptible from the driver’s and passenger’s point of view

It can also be upgraded into a full Akrapovic exhaust system by combining it with Evolution Race Header Set (without valves) or Evolution Header Set (with side mufflers and valves)

Protect engine block threads

making the system 45% lighter than the stock system

Fits Following Engines: 496 CID Chevy Big Block V8

ARP 660-1013 Metric Thread Bolt Kit M6 x 1.00 x 80 hex black oxide bolts ymm_34 and the difference is perceptibleSpecifications Socket Size(s) 8mm hex UHL 80mm Thread Length 18mm Grip Length 62mm Thread Diameter Spacing M6 1. 00mm Grip Diameter 6mm Wrenching 8mm Head Height 6. 5mm Collar Diameter 11. 6mm