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Sustainable Sierra Mercruiser Big Block V8 Exhaust Manifold 7.4 454 502 807078t10 807078t08 18-19571 18-1957-2 - Why Pay More? [impDWRTy]

$49.99 $159.99 -69%

Sierra Replacement Manifold Kit for MerCruiser Big Block V8 454 / 502 Engines 18-1957-2Comparable Part Numbers: • Osco: 9011A • GLM: 51240 • MerCruiser: 89011A8 , 807078T08 , 807078T10 , 89011 • Barr marine: MC-1-89011Kit Contains: • 1x Exhaust Manif

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Sustainable Sierra Mercruiser Big Block V8 Exhaust Manifold 7.4 454 502 807078t10 807078t08 18-19571 18-1957-2 - Why Pay More? [impDWRTy]

Sierra Replacement Manifold Kit for MerCruiser Big Block V8 454 / 502 Engines 18-1957-2

Comparable Part Numbers:
 • Osco: 9011A
 • GLM: 51240
 • MerCruiser: 89011A8 , 807078T08 , 807078T10 , 89011
 • Barr marine: MC-1-89011

Kit Contains:
 • 1x Exhaust Manifold
 • 1x Hose Fitting with Drain plug
 • 1x Mounting Package
 • 1x Manifold to Riser/Elbow Gasket
 • 1x Manifold to Head Gasket

SPECS

UPC:
808282371357
MPN:
18-19571

What Our Customers Say

February 5, 2026

Absolutely no complaints!

An excellent tool. Very solid.

- Rhodri K..

February 5, 2026

Absolutely no complaints!

It’s a very impressive and clever gadget.

- Jac T..

February 5, 2026

Absolutely no complaints!

This is a very well-conceived product.

- Evander Y..

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