PAC Racing Springs Mini 8 Degree Valve Lock - 5/16 in Valve Stem - Standard Height - Black Oxide (Set of 16) PAC-L8137-16 Edge Intake Duration 220

Intake Duration 220

Flows up to 12 GPM

1966-1970 Mercury Monterey

NASCAR Grand National series and 410 c

Can be converted to left or right side air

PAC Racing Springs Mini 8 Degree Valve Lock - 5/16 in Valve Stem - Standard Height - Black Oxide (Set of 16) PAC-L8137-16 Edge Intake Duration 220Product Description: Valve Lock Mini 8 8 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