The Poly-Vee water pump drive system uses interlocking grooves and vees (5 grooves in the water pump pulleys and 4 grooves in the belt) for maximum drive efficiency without the harmonic resonances that can affect toothed-belt water pump drives.
This deep-setback pump pulley is used with the matching Poly-Vee Crankshaft Pulley (Part No. 176-08-Long) and the 19 Inch Poly-Vee Water Pump Belt on typical FF2000 / Sports 2000 applications (except Swift) to drive the water pump at 64% of crankshaft speed.