Bolt-in cams for 96CI, 103CI and 110CI Twin Cam engines with stock, unmodified heads. Perfect for 2007-2016 Touring models, windscreen equipped or usually 2-up ridden 2007-2017 Softails and 2006-2017 Dyna's. These cams were developed to deliver immediate passing power in 6th gear at any typical cruising speed. They deliver an impressive gain in HP, with a huge increase of torque at lower engine speed, right where you accelerate around town and cruise on the highway. Red Shift 525 and up to cams provide immediate throttle response and acceleration at or below 2,000 RPM without detonation. This means your Harley moves cleanly from 50 MPH (80 km/h) and up, in 6th gear, without downshifting. Red Shift 525 cams are for 96CI models with or without Big Bore kits up to 103CI installed. Red Shift 528 cams are the successors of the proven 527 cams and have an improved ramp profile to reduce valve train noise. Red Shift 528 cams are for 103CI models with or without Big Bore kits up to 110CI installed. Both the 525 and 528 cams can be used with stock or adjustable pushrods.