(12 PCS) 551696 Exhaust Manifold Header Bolt Compatible with All GM LS & LT (Gen III, IV, V) Series Engines 1997 and Newer,Fits for LS1, LS2, LS3,

【Manufacturer Part Number】: 551696, 12617944, 03413B, 11518860, 11609481, 6506775AA, 6507423AA, 6507938AA 【Fitment】：12 Bolts Compatible for all LS series engines (except LS7) LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 LS2 LH6 L92 L76 LY2 LY5 LY6 LC9 LFA LH8 LMG LS3 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 【Premium Quality Material】：Exhaust Manifold Bolts Made from multi-layer steel (MLS) that is designed to withstand high temperatures and provide a reliable seal. 【Fitment】：NEW BOLTS Fits all GM LS & LT series engines 1997-up 【Size】：Grade 10.9, M8-1.25 x 25mm. Pack of 12 ，M8 x 1.25 thread. 25mm Underhead Length Fits Factory Exhaust Manifolds and Aftermarket Headers.

Material: ‎Alloy Steel Thread Size: ‎M8 Exterior Finish: ‎Plated Manufacturer Grade: ‎Grade 10 9 Head Style: ‎Flat Color: ‎bolts Fastener Type: ‎Hexagon Bolt Brand: ‎Zieichy Thread Type: ‎Unc Thread Style: ‎Right Hand Item Hardness: ‎Grade 10.9 Metal Type: ‎Alloy Steel Head Type: ‎Hex Thread Class: ‎Class F Maximum Shear Strength: ‎300 MPa Number of Pieces: ‎12 Manufacturer: ‎Zieichy Package Dimensions: ‎6.29 x 4.33 x 0.78 inches Item Weight: ‎7.5 ounces ASIN: ‎B0CH4X9JYR Item model number: ‎M8 x 1.25 thread Date First Available: ‎September 2, 2023