#PP1. Fits 4 clutch direct drum (not #8D drum). Replace 4 clutches with 6 Red Eagle clutches and Kolene steels for a 50% increase in clutch apply area. You get 6 Red clutches #28742, 6 Kolene steels #28701K, 1 selective steel #28701K216 and 1 #8FBP special backing plate. This Power Pack is mainly for 47RE transmissions and others with 4 clutch drums.