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57 Hemi Engine Build

In addition to the cam, the Stage II and III packages include a valvespring upgrade. A special tool from XV makes the swap easy, even with the heads in place. The modern "beehive" springs allowed the engine to easily spin to 6,800 rpm on the dyno.
5.7L Hemi Engine Build - Modern Mopar Muscle

In addition to the cam, the Stage II and III packages include a valvespring upgrade. A special tool from XV makes the swap easy, even with the heads in place. The modern "beehive" springs allowed the engine to easily spin to 6,800 rpm on the dyno.  View Related Article