Sierra 18-1957-2 MerCruiser 340 454 V8 Big Block Marine Exhaust Manifold 89011

Description

Mercruiser exhaust manifold
Direct replacement manifold fits Mercruiser GM V8 454 and 502 cu. in. engines with center riser
For Mercruiser 330, 340, & 454 Magnum model engines
Interchangeable between port and starboard side
Heavy duty cast iron
Painted black
Includes all gaskets, short riser studs, drain elbow, and plugs
Manifold mounting kit P/N 18-8532 – sold separately
Replaces Mercruiser 89011A8, 807078A2, 807078A4, 807078A6, 807078T09, 807078T10
Replaces Mallory 9-40506
Replaces Osco 9011A
Replaces Sierra 18-1957, 18-1957-1