Mercruiser 7.4-454-502 Manifolds
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Mercury Marine / Quicksilver$385.08 $330.07OEM MerCruiser 454 / 502 / 7.4 Manifold 807078T08 OEM MerCruiser E-Coated Exhaust Manifold Exhaust manifold 807078T08 is for use on the port or starboard (left or right) side of V-8 MerCruiser engines made by General Motors. It fits 454 or 502 cid...$385.08 $330.07
Sierra$484.49 $339.28Sierra 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 ,...$484.49 $339.28
Mercury Marine / Quicksilver$540.86OEM MerCruiser 454 or 502 Ceramic Coated Manifold 807078T10 89011 Fits 1981 and up GM 454 d 502 Port or Starboard Side. Replaces part numbers 89011A8, 807078A2, 807078A4, 807078A6, 807078T09 Can be used for freshwater or saltwater installations...$540.86
Browse this high-quality collection of MerCruiser 7.4-454-502 manifolds from NuWave Marine, and find the perfect part for the job. As we all know, performing routine maintenance on your MerCruiser exhaust is just part of owning a boat. Whether you love working on your boat’s engine, are a professional marine mechanic, or view maintenance as a necessary evil, you’ll want to be sure you’re using the best MerCruiser 7.4-454-502 exhaust parts on the market. At NuWave Marine, we recommend checking MerCruiser 454 manifolds (as well as 7.4 and 502 manifolds) for leaks and corrosion every year. After 5 years for saltwater applications, your exhaust manifold should be entirely replaced, even if there’s no apparent damage. For fresh water applications, exhaust parts may last longer, but it’s still a good idea to keep a watchful eye over your whole exhaust system. After all, one little leaky gasket could cause a catastrophic problem if not fixed right away.
MerCruiser 7.4 MPI Exhaust Manifold
If you have a multi-point injection engine, you'll need a manifold to match. When replacing a MerCruiser 7.4 manifold, you’ll need the manifold itself, plus a host of other parts. For this reason, NuWave Marine recommends MerCruiser 7.4-454-502 exhaust kits. These kits contain all the parts you need, including gaskets and bolts.
MerCruiser 502 Exhaust Manifold
Like the other designs, it’s important to keep an eye on your 502’s exhaust. Remember, replacing corroded Y-pipe parts is another aspect of routine maintenance. If your exhaust uses a Y-pipe, make sure that it doesn’t get overlooked. With a little caution now, you can prevent big problems now, before they start.
Buy Your Parts From a Trusted Supplier
NuWave Marine isn’t just a website. We’re a real brick-and-mortar store with a history of excellence that dates back to the 1980s. We only carry OEM parts and the very best aftermarket parts on the market. If we won't use them in our boat’s engine, we won’t sell them to you. If you have any questions about the parts you need for exhaust system repair, don’t hesitate to contact our knowledgeable team today.