Isky ISK9945RAD Tool Room Rad-9000 Valve Springs 1.625" OD 250LB Seat 675LB Open

ISKY TOOL ROOM RAD-9000 VALVE SPRINGS 1.625" OD 250LB SEAT 675LB OPEN ISK9945RADIntroducing Isky's new RAD-9000 process option for Tool Room valve springs. Under trade secret Radial-Densification (RAD), the physical properties of Tool Room springs are optimised for even greater surface to core uniformity. To insure they'll withstand the tortures of sustained high rpm operation, we subject each batch to the most rigorous real world test standard ever created, SPINTRONTEST II. It's a no holds barred run as high as 9000 RPM where for over 1,000 miles, race ending competitive abuse is continuously revisited. This pass or fail benchmark is the only test of its kind in the performance industry and every set of Tool Room springs conforms to its high standard.Specs:Number of Springs Per Valve:DualOutside Diameter of Outer Spring (in):1.625 in.Coil Bind Height (in):1.180 in.Damper Spring Included:YesSpring Rate (lbs/in):550 lbs./in.Inside Diameter of Outer Spring (in):1.175 in.Inside Diameter of Inner Spring (in):0.770 in.Valve Spring Style:StandardCoated:NoQuantity:Sold as a set of 16.Installed Height (in):2.020 in.Seat Pressure at Installed Height (lbs):250 lbs.Open Height (in):1.270 in.Open Pressure (lbs):675 lbs.Items are shipped within one to two business days after full payment has been recieved.