Got a pair of these for my 1998 GTP Grand Prix. If you're familiar with GM W bodies, you know that a lot of suspension parts rot on them, especially if you live in New England like me. They fit snugly over OEM trailing arms and don't have a U-groove that collects dirt and grime. If you're trying to replace them on your car, it's a good idea to also replace the brace on the body, as there's a chance it's rotten, although only GM dealerships have them. It was a good buy and I fixed it quickly in my driveway once I had all the parts and tools.