Features • INSTANT FULL BOOST / HORSEPOWER & TORQUE at ANY rpm - 2500 up. • Direct bolt on replacement. Easily installed. • More power, cooler charge temp, less power consumption/parasitic loss than stock Eaton. • 90% efficiency. · Approx. 13 psi gain per 1 psi boost. • 30% less parasitic loss and 30% lower air charge temp at same HP. • +70HP gain at 13 psi (489 vs 417). • Best $ value bolt on. More power than headers, cam, throttle body, MAF meter, chip and filter COMBINED. • 38HP at 13 psi just from reduced power consumption. • No "boost drop off" (stock Eaton is 13 psi @ 4000 and only 10.5 psi @ 6000). • No "boost lag" as with centrifugals and turbos. • Quick and easy 4 minute pulley/boost changes. • Boost range 9*- 26 psi. • Billet aluminum construction. • Whisper quiet. • Billet bypass valve. • Internally lubricated. No tapping holes in pan required. • Doesn't use engine oil. • Looks factory. • Available polished or black satin. • Stock "dual" or Kenne Bell "Big Oval" inlet manifolds available (optional). • Everything needed is in kit including Kenne Bell BOOST-A-PUMP™ & SWITCH CHIP®