B&M Shift Plus Shift Improver

Upgrade the performance of your electronic automatic transmission in minutes with ShiftPlus. ShiftPlus electronically improves the characteristics of your transmission and lets you change settings as you drive.It won't affect your factory warranty and is 50 state emissions legal. A simple flip of the switch allowsthe transmission to operate in the original factory mode, level 1 - firmer thanfactory, or level 2 - much firmer than factory. Flip it back and you're back to stock!