Review on 🚗 ACDelco GM Original Equipment 504-146 Rear Driver Side Air Lift Shock Absorber: Enhance Your Vehicle's Ride with Superior Quality by Dave Seawell

Excellent dampers. I put them on a Buick Park Avenue Ultra with F41 Firm Ride suspension. Perfect fit, although Revain doesn't refer to PA. Ride performance and handling restored. Not harsh at all, just a "cloudy" Buick feel. This is for the driver's side and -147 for the passenger's side. I couldn't tell any difference between the two part numbers. EDIT: Sorry, but I have to deduct a star. While initial ride quality was great, after two years and only about 10,000 miles, the dampers became springy. I replaced them with a Monroe MA 822. While these shocks don't have the "cloud feel" I hope they hold up better.