Mercruiser Exhaust Manifold

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Mfr # 18-4367. The Sea Star Solutions Mercruiser Exhaust Manifold collects the exhaust gasses from multiple cylinders into one pipe This exhaust manifold is a cast iron or stainles s steel unit that collects engine exhaust gas from multiple cylinders and routes them to the car catalytic converter A leak on the exhaust manifold allows exhaust gasses to escape It is the first section of a vehicle's exhaust system, bolted directly to the engine block It requires regular inspection to avoid catastrophic engine failure Key Features For CID engines 120 and 140 hp with Serial Number 6229718 and Up With siamese port cylinder heads GM 153 and 181, set for all Mercruiser cylinders 25 and 30 L Designed to match the exhaust ports for your engine Engineered to meet or exceed manufacturer specifications Specifications SKU 184367 UPC 030999563309 Weight 039 LBS This product replaces 474367, GLM39320, 2799777A1, 329800, AP744, 9239320D, 30999563309, Mallory 961406, Mercury Marine 2799777A1, GLM 39320 For GM 153 181 25 30L CID engs 120 140 hp sn 6229718 Up, With Siamese port cylinder heads This product replaces 474367, GLM39320, 2799777A1, 329800, AP744, 9239320D, 30999563309, 961406 Show more