If you're restoring or working on a classic Chevy or Pontiac, these leaf spring isolators are a must-have. They fit a bunch of models: Chevy Camaro (1968-1969), Chevy II (1968), Nova (1969-1979), and Pontiac Firebird (1968-1969)—rear position only. The part number is 6112g. They're basically these rubber or polyurethane bushings that go between the leaf springs and the chassis to reduce noise, vibration, and harshness. Over time, the original ones crack and wear out, leading to clunks and a rougher ride. These replacements are made from durable materials to handle the load and last. Swapping them out can make a huge difference in how the car feels on the road—way more solid and quiet. Just make sure your vehicle matches the fitment list before ordering. Great for DIY restorers or mechanics.