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PSI or PAC Valve Springs are used in our FRP aftermarket Hemi Non VVT cam kits in conjunction with Cam Motion titanium retainers, locks and shims for early 5.7 and 6.1 applications, depending on availability.
PAC 1276X Springs for 5.7 and 6.1 Applications
PSI 1516 Springs for 5.7 Applications
If you are looking for our cams, or complete cam/cam kit packages, check out our VVT offerings here . Our Non-VVT offerings can be found here.
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