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CMS 4V Stage 4 Spring Kit - .480" lift High Load

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Product Description

Spring load at 1.48" 152lbs
Spring load at 1.000" 300lbs
Spring rate 308 lbs per inch
Coil bind .965"

Performance .480 lift" beehive valve springs for the 4V Ford heads 96 and newer.  Drop in replacement, no machining necessary.  Includes springs and aftermarket moly retainers. These Valve Springs have been through multiple anti-fatigue processes and work very well on High Boost / High RPM Street / Strip Applications as well as Endurance / Road Race Applications. The Ultra High Seat Pressure of these Valve Springs can handle the most aggressive camshaft profiles and boost levels. 

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