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Engines and Components› Harmonic Balancers

ARP

ARP GM LS1/LS6 5.7L/6.0L Balancer Bolt Kit

$65.89 $32.66 Save $33.23

SKU: A00M 234-2503

In Stock
In Stock
Ships by Jul 30
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The ARP 234-2503 is a harmonic balancer bolt kit designed for GM Gen III/IV LS series engines. It features an M16 x 2.0 bolt size, a 4.330" under-head length, and a 12-point head style that requires a 1-1/16" wrench. The bolt has a black oxide finish and includes a washer. This kit replaces GM part number 12557840 and is suitable for 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L engine sizes.

Fitment

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Specifications

BrandARP
Part NumberA00M 234-2503

Buy with Confidence

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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