BDS Steel Blower Crank Hub (BDSCH-5004)

BDSCH-5004 - BDS BLOWER CRANK HUB, SBF

Suit SB Ford 289-302-351 Windsor & 302-351 Cleveland With External Balance (28oz)

Part Number: BDSCH-5004

BDS crank hubs are made from 4100 series aircraft alloy hardened steel, designed to replace the stock factory harmonic balancer for blower application only, and are necessary for proper operation and longevity of the complete blower drive assembly. Factory harmonic balancers are not designed to handle the additional stress of driving a supercharger along with other accessories. They will normally crack or break near the keyway and come off the engine causing severe damage