Correct.
I had air bags on my '07 Ram 3500 SRW. I currently have Timbrens on my '11 GM 2500HD. I much prefer the Timbrens.
Do you have the regular duty or heavy duty version?
I'm thinking about putting these on my 2016 GM 2500HD. I also see that SuperSpring makes a similar product called the Sumo Spring. Unlike the Timbrens, which are like a load carrying bump stop, Sumo Springs are connected at both top and bottom. I'm wondering if this might serve to mitigate chatter, dampening the lively factory setup.
