Bought a pair of these installed AC Delco drums and noticed a tremor after fitting, ended up taking the car to the brake shop the next morning to find they were supposed to be NEW and ready to install. t. They weren't round and caused a lot of back tremors, so I had to pay Brake Masters $56.60 to replace them, so you've been warned that you need to be prepared to have them rebuilt. So I have about $100 worth of rolls instead of $22 each. So if you're running into this problem, they're out of…