Banks Power 06-07 Chevy 6.6L LLY-LBZ Banks SpeedBrake (w/o Banks iQ)The World's First All Electronic Braking System. Cuts downhill speed up to 78 percent. All automatic, user selectable speed. Simple plug n play installation, no cutting or welding required. Extends the service life of your brakes, and does so while maintaining your sanity. The Banks SpeedBrake must be used with a Banks iDash (included). If you do not want to use the Banks iDash then check out our Banks Brake P N 55447. More effective braking than is