Andrews High-Lift Upper Spring Collars 271100

Intended to work with stock springs and add approximately .060" spring travel with no other modifications on 66-84 74" and 80" motorsThe easy way to install B or #2 cams in stock headsMade in the U.S...

Accommodates cam lifts of .550"+Installation does not require machining of headsKit includes four inner and four outer springsFor use with titanium upper-spring collarsCollars sold separatelyMade in...

Provide correct spring force for any of our performance cams when used in 74" and 80" motorsMax lift; installation does not require complicated machining but does require proper valvetrain setupMade...

Similar to stock 80-style parts, but lower profile for easier installation of higher lift camsRequired parts if you use 80-style valve guides that utilize "K" line stem sealsHeat-treated steelFor 74"...