Ferrea VQDE & VQHR Dual Coil Valve Springs The Delta Force Air Filters

The Delta Force Air Filters are serviceable with our new Delta Force cleaning kits which will help outlast your vehicle

100% Reliability

methanol or nitrous injection

any other use including recreational off-road use

Ferrea VQDE & VQHR Dual Coil Valve Springs The Delta Force Air FiltersFerrea VQDE & VQHR Dual Coil Valve Springs Outside Diameter: 20. 8mm Inside Diameter: 15. 88mm Seat Pressure: 80lbs @ 34 mm Open Pressure: 200lbs @ 24. 8mm Spring Rate: 305lbs inch Coil Bind: 19mm Max Net Lift: 13mm Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce