Spring pressure allows more power for plowing and heavy pulling- 390254 KIT - Light Spring Pressure 120181 KIT - Medium Spring Pressure 67597 KIT - Heavy Spring PressureIncludes: 390254N (PPA), 393117 HD6 (Disc), 8250529 (Greaseable Release Bearing), 836304 (Pilot Bearing), 535208 (Inner IPTO Seal), 535209 (Outer IPTO Seal) & 22414 (IPTO Bearing Cage O-Ring)The 390254 KIT 14" Single Stage Clutch Kit, w/ Bearings & Seals, Light Spring Pressure - New fits equipment brands such as: InternationalThe 390254 KIT is a substitute for the following discontinued products: 390254