ARP 135-2501 Hardened Balancer Bolt Kit for Chevrolet Big Block 396 427 454 502 EnginesThread Size: 1 2 20 in. RH Underhead Length (in): 1. 550 in. Head Style: 12 point Washer Included: Yes Fastener Yield Strength (psi): 200,000 psi Fastener Material: Chromoly Fastener Finish: Black oxide As the crankshaft flexes, the damper absorbs incredible amounts of energy. These damper bolt kits from ARP will ensure that your balancer is locked into position. They feature a 1 4 in. thick wide area washer and an extra tall, 12 point head that

Perfect for Chevrolet applications without offsets

These ZEX nitrous bottle heaters thermostatically raise the bottle pressure

1 oil drain plug gasket

Clevite H-Series main bearings were developed primarily for NASCAR racing

gov Advertised Intake Duration 260 Advertised Exhaust Duration 264 Intake Duration at

* Emissions accessory ports

Blow Down Tube Included: No

Thread Size:3/8-24 in

CAM PN: 54-452-11

of clearance

Advertised Exhaust Duration: 255

875" Bore 68-73   GM CAR 327/5