Using engineering blue on the std shim turn the installed cam one complete turn and you will see contact/wipe area of the lobe.Odds on it will wipe all the way off the edge of the shim with this amount of lift and will require under bucket Shims.HKS 8.35 mm lift cams wipe just shy of the shim edge.If the cam lobe wipes to the very edge the shim will rock and will spit out the side.