Banks SpeedBrake for 2007 - 2010 Chevy GMC Duramax 6.6L LMM. The Banks SpeedBrake cuts downhill speeds
by nearly 80% without using the brake pedal. Saves your wheel brakes, keeping
them cool and ready for emergencies. Dramatically reduces brake wear. And saves
thousands in brake maintenance! SpeedBrake's patented design lets you select
your downhill speed (anywhere from 25-75 mph), and then maintain that speed
automatically. It's like having exhaust brake cruise control!