Product Details This pulley is to suit the Billet Boss timing cover onlyWeight: 1.00 kgBlack oxided Mazda 4PK multi rib 24 tooth drive pulley CNC machined from high-tensile steel. suits:12A13B20BRotary Engine 4PK Multi Rib 24 Tooth Drive Pulley (suit billet Boss front cover)SKU: WE-MAZ-MR24T-BS-GAI$549.99PriceQuantityAdd to CartBuy Now