This Valve Shim Kit from Hot Cams will save you from unnecessary trips to the store or ordering incorrect shim sizes since you'll have all the shims you need on hand for pretty much any clearance. These shims are precisely manufactured with the exact diameter for your machine and are sized in convenient increments for a total of 47 different sizes of shim. 3 shims are included for each size and are organized in a compartmentalized plastic container to keep all of your 141 total shims together.