551696 Exhaust Manifold Header Bolt Kit M8-1.25×25mm Zinc Plated Grade 10.9 Flange Bolts for GM LS LT LS1 LS2 LS3 LSX Engines, 12 Pack

This exhaust manifold flange bolt kit is an aftermarket replacement for OEM 551696 fasteners, designed for GM LS and LT series engines. Made of Grade 10.9 high-strength alloy steel with zinc plated anti-corrosion coating, these bolts adapt to the high heat of exhaust systems and prevent rust in long-term use. The integrated flange design simplifies installation without extra washers, and precise threads lock tightly to avoid manifold looseness and exhaust leakage. One set includes 12 bolts to finish full vehicle replacement, suitable for DIY maintenance and auto repair shop use.

• 1. OEM Replacement Part #551696 Direct replacement for OE part number 551696, compatible with GM LS/LT series engines including LS1, LS2, LS3, LSX, LT1 for exhaust manifold repair.
• 2. Grade 10.9 High-Strength Zinc Plated Steel 10.9 high tensile alloy steel with zinc plated anti-rust finish, stable performance under exhaust high-temperature environments, effectively resist rust and thread seizing.
• 3. Standard M8×25mm Flange Structure Integrated flange hex head design removes the need for separate washers. Precision uniform threads ensure tight fastening without loosening during driving.
• 4. Complete 12-Pack Set 12 bolts per pack, enough for full installation on both sides of exhaust header for one vehicle, no extra hardware needed.
• 5. Wide Compatibility Ideal for exhaust manifold replacement and header modification on Chevy, GMC, Cadillac, Buick LS & LT engines.