Excellent torque with a very broad power band. Great for street performance and drivability. 1,500-6,700 RPM Operating Range 219/235 Duration at .050". 113 Degree Lobe Separation Angle 0.607/0.621 Valve Lift LS3/L92 Ready - The LSR Rectangular Port grinds are the best choice for 6.0 and 6.2 L LS engines with an LS3 or L92 rectangle port head. With a wider split between intake and exhaust duration, these grinds take full advantage of the superior airflow from rectangle port heads. Broad Powerband - Featuring a higher exhaust duration, wider lobe separation and more valve lift, the COMP Cams LSR series takes full advantage of the LS high flow cylinder heads. Fits GM LS GEN III/IV LS. 1-Bolt Configuration. Made in USA