BDS offers one of the largest selections of blower pulley style and sizes available. All blower pulleys are manufactured from billet aircraft aluminium alloy 6061 and are T6 heat treated ensuring performance and durability. Manufactured to the tightest tolerances in the industry. BDS blower pulleys are guaranteed to mesh properly with the belt, reducing excessive wear and drag on the entire drive system.Each pulley is stamped with the number of teeth for easy identification and is manufactured 3.5" wide with a two inch diameter register and a six hole pattern, with a 2.760" bolt pattern.