GSC Beehive springs for the 2008-2013 Mitsubishi Evolution X feature some of the most impressive manufacturing techniques in the industry. GSC beehive spring uses an ovate wire which utilizes advanced material heat treatment methods for superior load loss capabilities. This gives the springs the highest level of spring load retention while still maintaining good fatigue throughout the life of the spring. The retainer side of the valve springs have a smaller diameter to greatly reduce coil spring surging and improve valve control even at extreme RPM levels. Each new design is tested to 9,000RPMS so you can rest assure that you have the best possible valve spring set available on the market. Titanium retainers are included.
Includes 16 valve springs and retainers.
Factory seats are resused.