Sherwood 09959K Impeller Service Kit. Most commonly found on GM 350, 454, 8.1 PCM engine’s up to 2004. Also found on PCM crank driven V-Belt or crank driven PCM Excalibur & 5.0L Sport. DOES NOT work with 04+ Serpentine belt pumps.

Product Specs:

• Kit includes impeller, O-Ring, & 5 different paper gaskets
• Impeller measures 1-1/4″ tall
• Impeller measures 2-7/16″ in diameter
• Neoprene impeller material for engine cooling water pump applications.
• Replaces Sherwood 09959, 10685, 10687, 11422, and 18656.
• Impellers should be replaced every 100 hours or every other year in the spring.
• Don’t forget to carry a spare!