Hot rodders and performance builders, check this out. This Moroso 64051 is a top-shelf billet aluminum crankshaft pulley for your small block Chevy (fits '68 and later with a short water pump). It's machined from a single chunk of aircraft-grade aluminum, so it's incredibly strong and looks fantastic. It's a single-groove V-belt design with a 5.25-inch outer diameter. The deep, precision-cut groove keeps the belt planted even when you're revving the engine hard. The real performance benefit comes when you pair it with the matching Moroso water pump pulley – together they slow down the water pump by about 30%. This is called an \underdrive\ setup, and it frees up horsepower by reducing parasitic drag on the engine. The whole thing is hard-coat anodized for durability and a lasting finish. It uses a standard 36-degree, 17/32\ wide belt. If you're building for show and go, this is a premium pulley that gets the job done right.
Free 30-day returns 
Free 30-day returns
