After more than a year of testing, HRP is now in production of 2 new cam grinds for the Pro Fuel bikes. HRP-D cams are designed for additional torque, while the HRP-E cams are designed to achieve higher RPM’s. Both cams are .720 lift using the 1.74 rocker ratio and have more duration than our record setting HR-1 cams that are in most of our Derringer engines. We also designed this cam with a larger diameter lobe. Larger than most all other cams including our HR-1 cams. This allows the cam follower (lifter) to have a much easier time staying in contact with the lobe. These cams will fit all engines that use the XL 86-91 valve train.
Contact HRP for details