Delivers up to 70psi exhaust backpressure; Works great with stock applications; Combination Exhaust Brake & TapShifter; Access all 5 gears with a tap of your finger; Full control over transmission shifting; Utilizes factory variable geometry turbocharger as an exhaust brake for added retarding force; Outstanding for towing, racing and street use; For towing, gear down during hill descents and lock out overdrive for hill climbing and curvy roads; For street use, limit the range of gears to reduce gear hunting and keeping RPM high for quicker response; For racing and dyno, allows manual control of transmission gears and on demand control of torque converter lockup; New Ford OE 6.7L style shift lever with +/- selector switch; Mini gear selection display ; Premade wiring harnesses