Mercruiser - Risers

Sierra 18-1970-1 Exhaust Manifold Elbow

Fits Engines: Mercruiser V-6 and V-8 with 15° Down Angle and 3" O.D. outlet.


Sierra 18-1973 Exhaust Manifold Elbow

For: most early Model 120 HP Mercruiser applications.Replaces OEM part # MERCURY MARINE 55538A2


Sierra 18-1972 Exhaust Manifold Elbow

Replaces OEM part # MERCURY MARINE 76325A2.


Exhaust Manifold Riser, 4"

4" O.D., 90° down angle Fits 2.5 & 3.0L engines!


Sierra 18-1971 Exhaust Manifold Elbow

Fits Engines: Most early model Mercruiser 140 HP (4cyl) applications and some V8 GM & Ford end rise...


Exhaust Manifold Riser

Exhaust Riser For Inboard Mercruiser V-8 Engines


Most orders placed before 2PM EST, are shipped the same day!