Harmonic Balancer Bolt Kit | Chromoly Black Oxide | M16x2.00 12-Point | GM LS1 LS6 Gen 3/4 4.8 5.3 6.0 6.2 7.0L - ARP 234-2503

ARP Harmonic Balancer Bolt Kit – ARP-234-2503 | GM LS1 LS6 Gen 3 & 4

Keep your harmonic balancer locked in place under extreme load. As the crankshaft flexes at high RPM, the balancer absorbs massive amounts of torsional energy — and the last thing you want is it walking off the snout. ARP’s 234-2503 balancer bolt kit is engineered to hold tight where factory hardware simply can’t.

Key Features

• Chromoly steel construction for superior tensile strength over OEM hardware
• Black oxide finish for corrosion resistance
• 12-point head accepts a deep socket — no stripped heads, no excuses
• Washer included for correct clamping load
• Direct replacement for GM LS-series engines — no modifications required

Specifications

Fitment

Suits all GM Gen 3 & Gen 4 LS-series engines including 4.8L, 5.3L, 6.0L, 6.2L, and 7.0L variants (LS1, LS6 and related). Confirm fitment with your engine code before ordering.

Need help confirming compatibility or sourcing additional ARP hardware? Contact us — we’re here to help you get the right parts for your build.