LYNSHINE Exhaust Manifold Gasket & Bolt Kit 12617944 for GM LS Engines — MLS Gaskets + 12 Bolts

LYNSHINE 12617944 is a complete exhaust manifold gasket and bolt kit engineered to restore a tight, durable seal on GM LS-series V8 engines. This kit supplies the main multilayer steel (MLS) header gasket, three exhaust manifold gaskets and a full set of 12 replacement bolts designed for a wide range of Chevy, GMC, Cadillac and related GM models that use LS1, LS2, LS3, LS6, LQ4 and LQ9 families. The components are built to resist heat and pressure typical of factory exhaust ports, making it a practical service kit when you’re repairing leaks, replacing manifolds or doing a head service.

Which vehicles and engines does this gasket kit fit?

The LYNSHINE kit lists multiple OEM part numbers and fits many GM trucks, SUVs and passenger cars equipped with small- and big-block GM V8s from late 1990s through 2013 and beyond. Compatible models include Silverado/Sierra, Suburban, Tahoe, Avalanche, Camaro, Corvette, Escalade, Yukon, Hummer H2/H3, and several Isuzu and Saab rebadged GM platforms.

• OEM references: 12617944, 12558573, 12600530, 12620947 for cross-checking.
• Engine families: LS1, LS2, LS3, LS6, LQ4, LQ9 and similar V8s (4.8L, 5.3L, 5.7L, 6.0L, 6.2L).
• Vehicle examples: Silverado/Sierra 1500-3500, Suburban, Tahoe, Avalanche, Hummer H2/H3, Camaro, Corvette.
• Always verify OEM part number against your VIN or service manual before purchase.

What makes these gaskets and bolts suitable for exhaust use?

The primary gasket in this kit is a layered steel design that maintains sealing under repeated thermal cycling and exhaust backpressure without quickly deforming. The included bolts are intended to replace corroded or stretched fasteners, restoring proper clamp load and preventing leaks caused by loose manifolds.

• Multilayer steel (MLS) construction resists high heat and prevents blowouts.
• Bolt set replaces worn or rusted fasteners for accurate torque and fit.
• Manufactured and inspected to meet typical OE fit and function standards.
• Packaged as a matched kit: 2 main header gaskets + 3 manifold gaskets + 12 bolts.

How should I install and maintain this exhaust manifold gasket kit?

Installation is a standard exhaust manifold service: remove the old manifold, clean mating surfaces thoroughly, fit the new gaskets, and torque the new bolts to OEM specifications in the recommended sequence. Regular visual inspections after the first heat cycles and at routine service intervals help catch any settling or fastener loosening early.

• Clean flange surfaces to bare metal; remove carbon and old gasket residue.
• Use proper torque specs and tightening sequence per the vehicle service manual.
• Retorque after initial heat cycles if specified by manufacturer guidance.
• Inspect for exhaust leaks by sound or smoke at startup and idle.

Why choose this LYNSHINE replacement kit over single parts?

Buying the matched kit gives you all the gaskets and bolts needed for a complete manifold reinstall or repair, preventing repeat trips to the parts store and ensuring compatibility across the mating surfaces. The kit approach reduces the risk of mismatched parts and saves time during a repair or engine rebuild.

• One purchase contains all required gaskets and fasteners for the job.
• Cost-effective compared with buying each piece separately.
• Pre-inspected components reduce variability and installation surprises.

This LYNSHINE 12617944 kit is ideal for mechanics, DIY enthusiasts and fleet technicians working on GM LS-series V8s who need a reliable, heat-resistant exhaust seal and new hardware for manifold installation. Confirm the OEM reference or your vehicle’s engine code before ordering to ensure correct fitment, and follow factory torque and installation procedures for best results.

FAQ

Q: Does this kit include all bolts and gaskets needed for a full manifold install?

A: Yes — it includes 2 header gaskets, 3 manifold gaskets and 12 bolts to complete a standard install.

Q: Will these gaskets fit my LS-based 5.3L Silverado?

A: Likely yes if your OEM number matches the listed references; always confirm with VIN or service manual.