PAC Racing Springs Valve Spring Shims - 0.020 in Thick - 1.250 in OD - 0.570 in ID (Set of 16) UMI2653-B Ignition Box is Sealed and

Ignition Box is Sealed and Powdercoated For Harshest Of Locations

2 oz Bottle

the lightest

Includes wing nut

PAC Racing Springs Valve Spring Shims - 0.020 in Thick - 1.250 in OD - 0.570 in ID (Set of 16) UMI2653-B Ignition Box is Sealed andProduct Description: Valve Spring Shim 0. 020 in Thick 1. 250 in OD 0. 570 in ID Steel Set of 16 Traditional Springs are made from the same size (Diameter) wire throughout the helix of the spring. PAC Racing Springs has partnered with technology leaders in order to provide this advanced new tapered wire product. Tapered wire allows for a true progressive and dual rate without reducing spring travel and increasing weight from traditional methods.