Sierra 18-1970-2 Riser ElbowSierra Marine 18-1970-2 is a replacement riser elbow for V-6 and V-8 applications. Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements.Features: Fits: V-6 & V-8 Applications; 3" Outlet; 15 (3" O.D.); Interchangeable With: Barr; MC-20-98504; GLM; 51110; Mallory; 9-40557; Marine Power; 0992-115; MerCruiser Stern Drive; 95755A2; 98503A2; 98504A3; Osco; 8503A; Click to Download Sierra 18-1970-2 Riser Elbow Installation Instructions