Features include:

• Beehive design to reduce mass on the top part of the spring with th most linear motion
• Ovate wire to handle high lift cams without coil bind
• Triple shot peened to reduce stresses and promote long life
• Nitrided finish to prevent corrosion
• Will handle cams with over .500" valve lift

Note:  springs are beehive.  One end is .045" smaller than the other end, so the small end must  be installed to the top