StayCoolPumps Impeller Kit Replaces Volvo Penta 21951348 New Impeller Kit Includes Impeller and O-ring Replaces: Volvo Penta 21951348 1999-2005 Volvo Gas Sterndrives with GM Engines 3.0 , 4.3 , 5.0 , 5.7 , 7.4 , 8.1 Width 1-1/4" (31.5mm) . Diameter 2-1/4" (57mm) . 5/8 shaft 12 spline