Sierra 18-4224 MerCruiser V6/V8 Drain Elbow AssemblySierra high-quality engine parts are designed to meet OEM specifications. Features: Includes Drain; 3/4" NPT; Fits MCM/MIE V-6 & V-8 engines with center rise exhaust manifolds; Interchangeable with: GLM; 13990; Mallory; 9-41200; MerCruiser Stern Drive; 22-806926A1; 22-862210A01;