Handles up to 750 in. lift camshafts; designed for steep ramped large lift camshafts: these Feuling valve springs are made from premium stress relieved conical ovate wire with a nitride surface heat treatment, shot-peened surface enhancements along with a Nano Peen polish; they have an extremely high level of fatigue life and are designed to handle the highest demands of performance engines with high lift, steep ramped camshafts; Dyno proven and track tested.

• Uses a much smaller and lighter weight retainer, which drastically reduces the valve weight creating a much quicker revving and smoother motion than comparable dual valve springs
• Allows up to 750 in. lift cams, no rocker box clearancing required
• Eliminate valve spring separation, maximize stability, reduce valve-train noise and harmonics
• P/N 481850 for 10 Degree 5/16 in., includes valve stem, keeper grooves and .530 valve guide

• P/N 481851 for 7 mm valves with stock keeper groove
• Kits include Feuling High Load Beehive valve springs, lightweight 10 Degree titanium retainers manufactured from Ti-17 alloy and micropolished for enhanced fatigue life, machined, heat-treated chrome-moly spring seats, seat shims and valve locks and a set of premium Viton valve seals equipped with a spring loaded valve stem wiper system