Sierra Manifold - SIE-18-1957-2

Sierra 18-1957-2 MerCruiser V8 GM 1981-2002 Exhaust Manifold - Replaces 807078T10

When in need of a MerCruiser manifold replacement, Wholesale Marine carries economical options to get you back on the water fast.  Sierra has engineered a manifold replacement kit that includes the gaskets, spacers, and elbows so a complete manifold replacement can be installed quickly and easily.  The unit is manufactured to be installed on either port or starboard engine block. Replacement manifold is designed for MerCruiser but can also replace manifolds for other brands including Barr, GLM, Mallory, and Marine Power among others. The unit is ideally suited for freshwater applications. You can depend on Wholesale Marine to guarantee the lowest prices.

Application Info:

• MerCruiser V8 454 or 502 CID engines made by GM between 1981 and 2002.
• Interchangeable with:

MerCruiser Stern Drive

807078Q07

807078T08

Barr

MC-1-89011

GLM

51240

HGE

9011

Mallory

9-40506

Marine Power

0991-1000

Osco

9011

Use With:

Exhaust Manifold Gasket 18-0418

Mounting Kit 18-8532

Exhaust Elbow Gasket 18-0672

Exhaust Elbow Gasket 18-0897

Manifold Riser Spacer 18-1908

Elbow 18-1970-2

Elbow 18-1974-1

Elbow 18-1976-2

Manifold Spacer 18-1985

Exhaust Elbow Gasket 18-2849-1

Exhaust Elbow Mounting Kit 18-8554

Exhaust Elbow Mounting Kit 18-8555

Frequently Asked Questions

• What is the Sierra 18-1957-2 MerCruiser V8 GM Exhaust Manifold used for? The Sierra 18-1957-2 is a replacement exhaust manifold designed for compatible MerCruiser V8 engines manufactured by GM. The manifold can be installed on either the port or starboard engine block and is ideally suited for freshwater applications.
• What MerCruiser engines does the Sierra 18-1957-2 Exhaust Manifold fit? The Sierra 18-1957-2 is designed for MerCruiser V8 454 or 502 CID engines made by GM between 1981 and 2002. Verify your engine's displacement, manufacturer, and model year before purchasing to confirm compatibility.
• Does the Sierra 18-1957-2 Exhaust Manifold fit either side of the engine? Yes. The Sierra 18-1957-2 Exhaust Manifold is manufactured for installation on either the port or starboard engine block, allowing it to be used on either side of a compatible engine application.
• What brands and part numbers does the Sierra 18-1957-2 replace? The Sierra 18-1957-2 is interchangeable with MerCruiser 807078Q07 and 807078T08, Barr MC-1-89011, GLM 51240, HGE 9011, Mallory 9-40506, Marine Power 0991-1000, and Osco 9011.
• Is the Sierra 18-1957-2 Exhaust Manifold suitable for freshwater applications? Yes. The Sierra 18-1957-2 Exhaust Manifold is ideally suited for freshwater applications. The product description does not state that it is intended for saltwater applications, so verify the application before installation.
• What components can be used with the Sierra 18-1957-2 Exhaust Manifold? The Sierra 18-1957-2 can be used with specified exhaust manifold and elbow gaskets, mounting kits, manifold riser spacers, elbows, and manifold spacers. Verify the specific component part numbers against your application before ordering.