PAC Racing Springs 10 Degree Valve Lock - 5/16 in Valve Stem - Standard Height - Black Oxide (Set of 16) PAC-LR8067-16 Aluminum Racing Seat Port Center/Line to Center/Line Length:

Port Center/Line to Center/Line Length: 2

18" spiral cords stretch to approximately 5'

12: 1 and 14: 4 ratio boxes are for use without steering quickener and use #SWE401-50611 U-Joint (sold separately)

Requires Snap Cover

Holley 4165 / 4175 / Quick Fuel Carburetors

PAC Racing Springs 10 Degree Valve Lock - 5/16 in Valve Stem - Standard Height - Black Oxide (Set of 16) PAC-LR8067-16 Aluminum Racing Seat Port Center/Line to Center/Line Length:Product Description: Valve Lock 10 Degree 5 16 in Valve Stem Standard Height Steel Black Oxide 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