Note: On older 6.1L/5.7L heads, shims go over the spring seat since spring seat/locator has the valve seal built in. For 6.4L/6.2L VVT heads (as pictured in this guide), shims go under the spring seat (they will not fit over).
Old spring and retainer come off:
Spring seat/locator comes off (6.2L/6.4L only):
Install shims:
Reinstall spring seat/locator:
Install new spring:
Install new Manley titanium retainer on top of spring:
Use tool to depress spring/retainer & reinstall valve locks:
Looking for a spring compressor tool? Find it on our web store here:
https://highhorseperformance.com/hemi-valve-spring-tool-sahvst/
Applicable spring kits: