LS Harmonic Balancer Bolt Kit

The ARP LS Harmonic Balancer Bolt Kit (234-2503) provides a superior replacement for the OEM crankshaft bolt on GM Gen III/IV LS and Gen V LT engines. Constructed from high-strength chromoly material, this bolt boasts a tensile strength of 200,000 psi, significantly exceeding OEM specifications. It features a M16 x 2.0 bolt size, a 4.330" underhead length (UHL), and a convenient 1-1/16" wrenching size. The black oxide finish provides corrosion resistance, and a washer is included for proper installation. This kit is compatible with a wide range of GM LS engines, including 4.8L, 5.3L, 5.7L (LS1, LS6), 6.0L (LQ4, LQ9), and 6.2L (L92, L76, L77, L96) variants. However, it is crucial to note that this bolt kit does NOT fit LS7 engines or dry sump engine applications. It replaces the GM part number 12557840.