"DO NOT REMOVE THE 4 PADS" ?? if the shim does not have holes for the pads, they must be removed before installing the hsf. Some shims now have holes for the foam pads, others do not. As posted, you can have lots of troubles with shims, the manufacturing tolerances must be good, otherwise the HSF will not sit flat on the core, they can easily warp, same result. My recommendation, don't use 'em.