Isky Racing Cams 9985 | Engine Valve Spring Kit

The Precision 9900 Series "Gold Stripe" Tool Room Racing Value Springs by Isky. Theyre the worlds only endurance test-certified racing valve springs, guaranteed "One of the Thousand", alumni of the grueling 1,000 mile Spintron endurance test, where two complete tests are run with a zero failure tolerance. No breakage and no excessive load loss are permitted, because its pass or fail for Tool Room Springs. We test every batch of every part number we produce. We refer to them as The Worlds Finest Racing Valve Springs - because without a doubt whatsoever, they most certainly are!

• Tool Room™ Racing Valve Spring
• Worlds Only Endurance Test Certified Racing Valve Spring
• For Roller Cam; Rate Per Inch 500; Coil Bind 1.200; Max Net Lift 0.700 in.;
• Tool Room™ Racing Valve Spring; Dual w/Damper; Outer OD/ID 1.560/1.145in.; Inner OD/ID 1.040/0.740in.; Seat Pres. 245lbs at 2.000 in.; Open Pres. 600lbs at 1.300in.;
• No Breakage Or No Excessive Load Loss Are Permitted