Ping, Pong, Groan
The noisiest springs I've ever owned. They moan and groan over the slightest road imperfections and sound like you're driving a hunk of junk. I went back and re-installed them with no change. The noise didn't improve after 9 months and 20,000 miles. Don't buy. Stay away. Move on. If only I had held onto the 'original box' I could return them. Instead, I'll be recycling them with a lesson learned about Lifetime Limited Warranty and Easy Returns.
Bottom Line No, I would not recommend to a friend