Pressure Calibration Kit GM Allison 1000 and 2000 Series 2011-2016 450HP-800HP
For the everyday truck.
Designed to improve shift firmness with variable spring selections to achieve your desired results.
Matching minimum pressure and boosted pressure levels that are adjustable within the kit for stock 450HP up to 800HP.
Application: 2011-2016 450-800HP Allison 1000 and 2000
Installation Guide: 128041011 Pressure Calibration Kit 11-16 450-800HP_v1C.pdf