Description:You must have high compression and headwork to run these cams. My car has gotten about more hp above rpm with these cams but they did cost significant bottom end hp. I have since returned to the regular street grind as this grind is much more torquey and fun to drive. JWT will also soon release a Pro- Series cam that will have about degrees duration with a whooping 12mm of lift. These will require special valve spring and titanium retainers. With their ultra fast profile, these cams should give near VTEC like top end while retaining reasonable bottom end. To exploit these cams you will need high compression and headwork. I will be testing these cams soon and will report how they work.