?Product Description
This complete cast iron exhaust manifold and riser combo kit is premium aftermarket replacement compatible with MerCruiser wet joint marine engines. The riser adopts precisely positioned water jackets to enable smooth water flow and efficient engine cooling. Constructed with coated high-strength cast iron, the assembly delivers outstanding wear resistance, vibration resistance and anti-corrosion performance, working reliably in freshwater and saltwater.
Aged, cracked or deformed exhaust manifolds and risers may leak or break under long-term mechanical stress, creating potential safety risks. This full combo replacement kit optimizes exhaust circulation, improves engine power output and lowers fuel consumption for consistent marine engine operation.
This is wet joint style assembly. Not compatible with post-2002 dry joint engines.
?Specification
Type: Manifold & Riser Kit
Color: As Pics Shown
Material: Cast Iron
Riser Hose Compatibility: Fits 4" hose
Fitment: Direct Replacement
?OEM Part Number
Manifolds:
Replacement for MerCruiser: 99745, 99746, 99746A8, 99746A17
Replacement for Osco Motors: 9745
Replacement for Barr Marine: MC-1-99746
Replacement for Sierra Marine: 18-1952-1
Replacement for HGE: 9746-A, 9746
Replacement for Aqua Power: 5505
Replacement for GLM Products: 51225, 51220
99746A17, 99746A3, 99746A8, 44354A13, 44354A3
807914A1, 807988A03, 807988A08, 807988A2, 807988Q03
27-99757, 27-863724Q, 10-43749, 13-35048, 10-53728
Risers:
Replacement for MerCruiser: 44354, 807914, 807988, 807988Q03, 807988A2, 807988C, 807988-C
Replacement for Osco Motors: 4354
Replacement for Barr Marine: MC-20-44354, MC2044354
Replacement for Sierra Marine: 18-1976-1, 1819761
Replacement for HGE: 4354, 4354-A, 4354A
Replacement for Aqua Power: 5706
Replacement for GLM Products: 51140
?Fitment
Replacement for MerCruiser Wet Joint V6 & V8 marine engines equipped with 4-inch outlet risers:
V6 GM 229 CID: 1983–1984 MerCruiser 175/185/205
V6 GM 262 CID (4.3L): 1985–2002 MerCruiser 175/185/205
Small Block V8: 1983–2002 MerCruiser 200–320 GM 5.0L(305CID), 5.7L(350CID), 6.2L(377CID)
Big Block V8: 1981–2002 MerCruiser 330–370 GM 7.4L/8.2L (454/502 CID)
❗Important Notice
This is a WET JOINT style combo kit. It does NOT fit post-2002 DRY JOINT manifolds and risers.
2002 is a transition split year. Please verify your original component is wet joint type before ordering.
?Features
①Complete OEM Combo Kit: Includes manifolds, risers, gaskets and bolts. Direct bolt-on compatible with MerCruiser wet joint systems, cross-references multiple OEM numbers.
②Coated Cast Iron Construction: Anti-corrosion coating prevents rust for long service in fresh and saltwater.
③Optimized Exhaust Flow: Precision casting enhances airflow, boosts power and reduces fuel consumption.
④Heat & Vibration Resistant: Sturdy cast iron lowers risks of cracks, leaks and exhaust blowouts.
⑤Wide Compatibility: compatible with MerCruiser V6 & V8 wet joint engines. Not compatible with post-2002 dry joint assemblies, suitable for various marine boats.
?Package Included
2 Pcs Exhaust Manifolds
2 Pcs Riser Kit
Gaskets & Mounting Bolts
Accessories As Pics Shown
