ARP 156-2501 (4.6 / 5.4 Ford Modular Harmonic Damper/Balancer Bolt)
ARP Part #: 156-2501
Thread Size: 12mm x 1.50
Underhead Length (in): 1.880 in.
Head Style: 12-point
Washer Included: Yes
Fastener Yield Strength (psi): 200,000 psi
Fastener Material: 8740 chromoly
Fastener Finish: Black oxide
Quantity: Sold individually.
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 accepts a deep socket to eliminate the fear of stripping the head.