High Quality Aluminum. These Cam Tower Shims are precision machined, not stamped. Shims span entire width of Cam Tower. Cam Tower Shims are used to make the upper chain tight again when a cylinder head has been overly-planed. It should be noted that most of the time cylinder heads are surfaced on the bottom. However, there are times when they are surfaced on the top. It may be necessary to use our Shims in conjunction with one of our thicker head Gaskets to restore accurately the same amount of material to each side of the cylinder head that was removed. Sizes available:

.025 Order by PART # 1152A

.030 Order by PART# 1152B

.048 Order by PART# 1152C

.064 Order by PART#1152D