Adv. Duration 264° / Dur. @ .050" 232° / Lift @ cam .411" / Lift w/1.1:1 Rocker Arms .452" / Lift w/1.25:1 .514" / Lift w/1.4:1 .575"The all new "Big Foot Super Lift Series" feature computer plotted, asymmetric lobes that provide profiles that are different on the opening and closing sides. Asymmetric profiles provide maximum allowable opening velocity and more duration at total lift that standard camshafts. A slower more gradual closing ramp is used to enable your engine to operate at higher RPM without valve float. Asymmetric cams produce better power over a broader range than can be achiveved with standard VW camshafts.