2001-2010 GM 6.6L Duramax w/ Allison 1000-2000 Transmission Pressure Calibration Kit

This kit serves as a great upgrade when building a 5 or 6 speed Allison 1000 transmission. This kit is recommended for trucks hauling heavy loads and making high horsepower. The increase in line pressure improves your clutches' holding ability and the calibration springs will tighten up shifts.