PCM RP061022 impeller service kit commonly used on newer PCM Engines. Known to be used on Excalibur 330, EX343, ZR6, ZR409, 5.0L Pro Sport, and GM 5.0L, 5.7L & 6.0L with a serpentine belt. Fits Pumps: RA057032 6.0L RA057034 5.7L RA057035 8.1L RA134071 Bearing Housing Assembly Impeller Specifications: Width: 2" (50.8mm) Diameter: 2-1/4" (57mm) Shaft: 5/8" (16mm) Drive: Double Flat Material: Neoprene Silhouette: 10 blades