To start our line of LS cams, this ZL9 cam was designed to conform to the strict rules of Grand Am competition.  With a slight lope at idle, it is ground on a 110 degree lobe separation for great low end torque, and with 209/223 duration, it runs hard to 6800 rpm.  It is an excellent choice for 5.7L & 6.0L cars and trucks.  Drives like a stock cam.  The .568"/.584" lift numbers require springs.  40-50 hp over stock cam.