Billet Specialties Part Number: 81120. Yogi's Part Number: BLT 81120. Billet Specialties crankshaft pulleys are CNC machined from forged 6061-T6 aluminum for the ultimate in strength and balance. Designed for use with v-groove style belts on Chevy engines, each pulley is polished to a mirror finish and includes stainless steel mounting hardware.
