Get the total control you always dreamed of with a BD TapShifter. Kit includes a factory looking shift lever that gives you gear control at your fingertips. Great for passing, pulling, hill climbing or whenever you need to change gears quickly. Limit transmission gear hunting and access all five gears; limit upshifts and better control downshifts. Straightforward install and operation, utilizes the factory connectors so you re back on the road quicker. Works great with engine retarders like BD s own VVB.