Isky Racing Cams 9365PLUS | Engine Valve Spring Kit

SP Springs - High Endurance The "SP" series utilizes "Hi-Tensile" Chrome Silicon outer spring material. For applications with radical cams and/or moderately high rpm, where traditional chrome silicon springs prove inadequate, the "SP" series is the next highest level of endurance. All "SP" series springs are Spintron Test-Proven up to 8000 rpm for 700 racing miles. PLUS Springs - Endurance Plus The Endurance Plus series of valve springs utilizes a specially processed Tool Room Material outer spring for increased endurance/reliability beyond the "SP" series. Endurance Plus springs are designed for late models, modifieds, etc., and are Spintron Test-Proven up to 8400 rpm for 850 racing miles.

• Utilizes Hi-Tensile Chrome Silicone Outer Spring Material
• Spinton Test Proven Up To 800 RPM For 700 Racing Miles
• Rate Per Inch 470; Coil Bind 1.170; Max Net Lift 0.680 in.; Tool Room Outer/Silicon Inner; Roller Cam;
• Endurance Plus™ Series Extreme Dual Valve Spring
• Endurance Plus™ Series Extreme Dual Valve Spring; w/Damper; Outer OD/ID 1.560/1.145in.; Inner OD/ID 1.040/0.740in.; SeatPress. 235 lbs. at 1.950in.; OpenPres. 560 lbs. at 1.270in.;
• Next Highest Level Of Endurance