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Your cart is empty.The Michigan Motorsports LS Lifter Guide Tray Bolts provide a high-quality, direct replacement for GM Part #12551163, ensuring secure and reliable installation of lifter trays in GM LS-based engines. Whether you're performing a full engine rebuild, swapping camshafts, or replacing lifters, this set of four bolts is designed to meet OEM torque specifications for long-lasting performance. Constructed to OEM standards, these bolts are engineered for durability and proper fastening of lifter trays, preventing unwanted movement under high-RPM and high-performance conditions. Compatible with a wide range of LS engines, including LS1, LS2, LS3, LS6, LQ4, LQ9, L92, L99, L33, LY6, and L76, this kit is an essential component for any LS engine build or maintenance project. Ensure your LS lifter guide trays stay securely in place with a set of bolts designed for reliability and precision fitment. Perfect for mechanics, engine builders, and LS swap enthusiasts, this bolt kit provides the strength and security needed for maintaining proper valvetrain performance.