ARP Harmonic

Harmonic Crankshaft Rotation Bolt 7/16"-20

$35.97

SKU: 134-2503

In Stock
In Stock
Ships by Aug 29
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

This ultra-strong bolt is constructed from heat-treated 8740 chromoly steel and boasts a tensile strength of 200,000 psi, ensuring it can withstand the significant kinetic energy absorbed by the balancer. Featuring a 7/16"-20 bolt thread and a 2.470" under-head length, this ARP bolt is designed for optimal fit and function. Its unique 1/2" square drive forged into the bolt head allows for simple rotation of the crankshaft with any standard 1/2" drive ratchet or breaker bar, simplifying engine assembly and servicing. The bolt is finished with a heavy-duty black oxide coating for durability and corrosion resistance. It includes a 1/4" thick wide area washer for even load distribution.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandARP Harmonic
Part Number134-2503
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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