Exhaust Boot - 18-2748

Sierra Exhaust Boot-  18-2748

Upper Tube: 4" or 101.6mm
Fits: MCM 120, 140 & GM V-6 & V-8 engines
Use with: Riser with Exhaust Tube 18-1975-1

Interchangeable with the following:

GLM
89120

Mercruiser Stern Drive
32-44348
32-44348001
32-44348T