Sierra 18-4349 Exhaust Manifold Gasket Set, Interchangeable with GLM 39880 and Mallory 9-61455

The Sierra 18-4349 Exhaust Manifold Gasket Set is a complete gasket kit for marine stern drive exhaust manifolds, engineered to seal the manifold-to-block and elbow-to-manifold joints against the extreme heat and vibration of continuous marine operation. Each kit contains four gaskets: two 18-0872 exhaust manifold gaskets and two 18-0897 exhaust elbow gaskets, giving you everything needed to reseal both manifold joints in one package rather than sourcing gaskets separately. Sierra engineers this set to meet or exceed the performance of the original equipment part it replaces, so it installs and seals the same way the factory gasket did.

This gasket set is designed as a direct interchange for GLM 39880 and Mallory 9-61455, so if your parts manual or old gasket carries either of those numbers, the Sierra 18-4349 is the correct replacement. Use it any time you are servicing exhaust manifolds or elbows during a rebuild, replacing a leaking gasket, or performing routine maintenance on a stern drive exhaust system.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-4349
• Product Type: Exhaust Manifold Gasket Set
• Contains: (2) 18-0872 Exhaust Manifold Gasket, (2) 18-0897 Exhaust Elbow Gasket
• Weight: 0.38 pounds
• Interchangeable With: GLM 39880, Mallory 9-61455

Fitment

• Serial number range 6218462-B525981

Replaces (OEM)

• GLM 39880
• Mallory 9-61455

Frequently Asked Questions

What does the Sierra 18-4349 gasket set include? The Sierra 18-4349 kit includes four gaskets total: two 18-0872 exhaust manifold gaskets and two 18-0897 exhaust elbow gaskets, covering both manifold sealing points in a single package.

Is the Sierra 18-4349 the same as GLM 39880? Yes, the Sierra 18-4349 is interchangeable with GLM 39880, so it can be used as a direct replacement wherever that number is specified.

Does the Sierra 18-4349 cross-reference to a Mallory part number? It does. The Sierra 18-4349 Exhaust Manifold Gasket Set is interchangeable with Mallory 9-61455.

How much does the 18-4349 gasket set weigh? The Sierra 18-4349 Exhaust Manifold Gasket Set weighs 0.38 pounds.

What serial number range applies to the 18-4349 gasket set? The Sierra 18-4349 is specified for serial number range 6218462-B525981.

Are the manifold and elbow gaskets sold separately, or only as a set? The 18-4349 is sold as a complete set containing both the 18-0872 exhaust manifold gaskets and 18-0897 exhaust elbow gaskets, so both joint types are covered in one purchase.

Is the Sierra 18-4349 an OEM or aftermarket part? The Sierra 18-4349 is an aftermarket gasket set engineered to meet or exceed the performance of the original equipment part it replaces.

Can the 18-4349 be used for a full exhaust manifold rebuild? Yes, since it includes both manifold gaskets and elbow gaskets, the 18-4349 set provides the gaskets needed to reseal the manifold assembly during a rebuild or gasket replacement job.

How many gaskets come in one Sierra 18-4349 kit? One Sierra 18-4349 kit contains four gaskets: two 18-0872 exhaust manifold gaskets and two 18-0897 exhaust elbow gaskets.

What is the difference between the 18-0872 and 18-0897 gaskets included in this set? Within the Sierra 18-4349 set, the 18-0872 gaskets seal the exhaust manifold joint while the 18-0897 gaskets seal the exhaust elbow joint, and both are included as a pair each.