Race Day LS LLR Camshaft (243/257-108.5+3.5) for "Single Plane" Rectangle Port

Product Description Grind # LL243/405-LL257/395-08.5+3.5 Duration at .050: 243/257 108.5 Lobe Center Angle with a 105 Degree Intake Centerline Lift with 1.7 Rocker Arm Ratio: .688″/.671″ Recommended Displacement: 6.0-6.2 Liter Engines Cylinder Heads: Rectangle Port Recommended Compression Ratio: 11.75-13:1 Recommended Headers: 1 3/4″ – 1 7/8″ Recommended Stall Converter: 4500-5500 Recommended Rear Axle Ratio: 4.11-4.88 *Specifically designed for single plane and other short runner intake manifolds. This Race Day LLR “Single Plane” – Rectangle Port camshaft is designed for Drag Racing applications in cars using 6.0-6.2 liter LS engines equipped with rectangle port, LS3/L92 style heads and single plane intake manifolds like the Victor, High Ram, Mid Ram and GMPP style intake manifolds. Ideal for the enthusiast who is looking to get great results while maintaining a modest RPM range. This camshaft is intended to be used with high compression and the proper racing fuel for best results. The base version of this camshaft is designed to work with adjustable rocker arms and quality performance solid lifters. This camshaft will have a rough, racecar idle. This camshaft requires pistons with valve reliefs for proper piston-to-valve clearance. This camshaft requires intake and exhaust modifications for maximum flow. Headers, open or racing exhaust, racing intake systems, properly suited racing torque converter and optimal rear axle ratios to achieve maximum performance. This Race Day cam is designed with our renowned smooth cam lobe design that provides quiet valve train operation and excellent upper rpm stability. Cam Motion offers this cam in our top of the line 8620 camshaft cores. You can read more about our cam cores here > Cam Motion’s cam cores Recommended Accessories: •Adjustable Roller Rocker Arms •Cam Motion Solid Roller Lifters •Cam Motion VSK143306 Dual Valve Spring Kit •Cam Motion 5/16″ diameter, .120″ Wall or 3/8″ diameter, .135″ wall Hardened Chromoly Pushrods *This camshaft will require pistons with valve reliefs for proper piston-to-valve clearance.