2Pcs Manifold Riser Kit Fit for MerCruiser 1981-2002 Small Big Block V8 V6 18-1976-1 25512838
This cast iron riser kit is an OEM-grade replacement for 1981-2002 MerCruiser wet joint V6 & V8 marine engines. Complete with riser elbows, gaskets and bolts, it features anti-corrosion coated cast iron to deliver smoother flow and reliable performance in fresh or saltwater.
?Specification
Type: Manifold
Color: As Pics Shown
Material: Cast Iron
Fitment: Direct Replacement
?OEM Part Number
MerCruiser: 44354, 807914, 807988, 807988Q03, 8079882A, 807988C, 807988-C
Osco Motors: 4354
Barr Marine: MC-20-44354, MC2044354
Sierra Marine: 18-1976-1, 1819761
HGE: 4354, 4354-A, 4354A
Aqua Power: 5706
GLM Products: 51140
Osco Motors: 4354
Barr Marine: MC-20-44354, MC2044354
Sierra Marine: 18-1976-1, 1819761
HGE: 4354, 4354-A, 4354A
Aqua Power: 5706
GLM Products: 51140
Manifold Hose Compatibility: Fits 4" hose
?Fitment
?Fitment
Replacement for most MerCruiser V6 & V8 engines (4.3, 5.0, 5.7, 6.2, 7.4):
1983-2002 MerCruiser MODEL 175-205 V6, GM 229/262 CID
1983-2002 MerCruiser 200-320 GM 305/350/377 CID Small Block V8
1981-2002 MerCruiser 330-370 GM 454/502 CID Big Block V8
❗Notice: This is WET JOINT style part, NOT replacement for post-2002 newer DRY JOINT risers.
2002 is a split model year, please double-check your original riser style before purchasing if your vessel is a 2002 model.
?Features
①Full Complete OEM Replacement Kit: Comes with cast iron riser elbows, matched gaskets and installation bolts, engineered to OEM standards, fits wet joint systems and cross-references multiple MerCruiser OEM part numbers.
②Corrosion-Resistant Premium Cast Iron Build: High-strength cast iron with protective outer coating effectively resists rust and degradation in both freshwater and saltwater marine environments for extended service life.
③Optimized Flow & Improved Engine Efficiency: Superior cast iron structure enhances exhaust circulation, lifting engine power output while cutting fuel consumption for better overall marine engine performance.
④Outstanding Heat & Vibration Resistance: Tough cast iron material withstands extreme engine heat and running vibration, lowering risks of manifold cracks, gasket leaks and blowouts during operation.
⑤Wide Compatibility: Specially replacement for 1981-2002 MerCruiser V6 & Small/Big Block V8 wet joint engines, not compatible with post-2002 dry joint riser models, ideal for cruising, fishing and water sport boats.
③Optimized Flow & Improved Engine Efficiency: Superior cast iron structure enhances exhaust circulation, lifting engine power output while cutting fuel consumption for better overall marine engine performance.
④Outstanding Heat & Vibration Resistance: Tough cast iron material withstands extreme engine heat and running vibration, lowering risks of manifold cracks, gasket leaks and blowouts during operation.
⑤Wide Compatibility: Specially replacement for 1981-2002 MerCruiser V6 & Small/Big Block V8 wet joint engines, not compatible with post-2002 dry joint riser models, ideal for cruising, fishing and water sport boats.
?Package Included
2 Pieces Manifolds (As Pics Shown)