1) Double groove Polished aluminum GM power steering pump pulley. 2) Fits all GM key way Saginaw style power steering pumps. 3) Fits all GM (Chevy, Oldsmobile, Buick, Pontiac, Cadillac) pre-1984 power steering pumps using the keyway style (nut on the front). 4) Fits all water pump styles (short and long). 5) 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. 6) The diameter is 5 3/4" and the shaft is 5/8" standard. 7) Machined from polished aluminum. 8) These feature deep grooves to prevent belts from slipping. 9) Package includes: As shown in our pictures. This Item Doesn't Come With Installation Guides. We Highly Recommend Professional Installation.
