Feuling Endurance Beehive Valve Spring Kit for Harley Twin Cam XR & XL Models

Description FEULING High Load Beehive Valve Springs deliver reliable valve control for aggressive Harley performance builds. They also support steep-ramped camshafts up to .750 lift with no rocker box clearancing required. FEULING builds each spring from stress-relieved conical ovate wire. In addition, nitriding, shot-peening, and Nano Peen polishing improve strength and fatigue life. As a result, these springs handle high RPM and heavy valve-train loads with confidence. Each kit comes hand measured by coil bind and open height. At the same time, included shims allow you to set installed height to match your camshaft lift. This helps reduce noise while improving valve-train stability. The Beehive design uses lightweight titanium retainers instead of bulky dual springs. So valve mass drops, engines rev quicker, and motion stays smoother. �� Key Features Supports camshafts up to .750 lift Also requires no rocker box clearancing Helps reduce valve spring separation As a result, improves stability and smoothness Fits 5/16 and 7mm valve stems �� Spring Pressure Specs 217 lbs @ 1.789 (0.574 lift) 200 lbs @ 1.845 (0.630 lift) 170 lbs @ 1.935 (0.720 lift) 415 lbs @ 1.215 open height Coil bind @ 1.125