Description:

Creates higher load, higher RPM and more lift capacity than stock parts. Complete kitincludes (32) springs, (32) retainers, (32) seats, and (32) Seals. Increased valve control over stock springs (especially at high RPM) thanks to a performance-driven design and proven modular engine track record Fits 2011-2014 and 2015-LaterFord Coyote and Boss 5.0L engines Max Lift Seat Load Open Load Rate Coil Bind Outer Diameter Inner Diameter .550" 93 lbs @ 1.57" 198 lbs @ 1.02" 191lbs/in .952" Top .959" / Bottom 1.061" Top .636" / Bottom .738" Please note the above image does not show full spring kit.