Mercruiser Marine Exhaust Manifold - GM V6 4.3L 1985-2002 | Sierra 18-1952-1
Mercruiser Marine Exhaust Manifold - GM V6 4.3L 1985-2002 | Sierra 18-1952-1
Sierra
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Mercruiser Marine Exhaust Manifold - GM V6 4.3L 1985-2002 | Sierra 18-1952-1
Center rise exhaust manifold fits Mercruiser 3.8L & 4.3L CID marine engines.
- Mercruiser Marine Exhaust Manifold - GM V6 4.3L 1985-2002
- Direct replacement manifold fits Mercruiser GM V6 229 and 262 cu. in. engines
- Riser mating bolt dimensions are 3-7/16" (87.3mm) by 3-1/16" (77.8mm) bolt center-to-center
- For Mercruiser 175, 185, and 205 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 18-8533 – sold separately
- Replaces Mercruiser 99745, 99746, 99746A8, 99746A17, 99746A3
- Replaces Osco 9745
- Replaces Sierra 18-1952
- Limited lifetime warranty
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.