Single groove. For use on gm engines including 265 283 305 327 350 383 400 396 427 454 472 500 502 326 455 389 403 as well as v6 engines. Fits all water pump styles (short and long).
Racing Power R8941, One Chrome Steel Power Steering Pulley Fits Gm Chrome Perfor
Tuff-Stuff 8485A, One Chrome Steel Power Steering Pulley Si N Fits gle Groove Fo
GM Chrome Steel Power Steering Pump Pulley Single Groove V-Belt 3/4 Press Fit
GM V-Belt Steel Power Steering Pulley Single Groove Chrome E43601C