Big torque and top end gains. Will make well over 138+ HP using ported heads, performance exhaust and intake system 248/254 Durationa at . 053". 110 Degree Lobe Separation Angle. 0. 522"/0. 522" Valve Lift The Best Choice for Harley M8 - COMP Cams Harley Milwaukee 8 grinds are the most advanced available. Delivering unsurpassed torque production and power under the curve. Made in USA