Review on Optimize Your Vehicle's Performance with Timbren FR1504D Suspension Enhancement System by Jason Cox

I bought a truck and the inspection showed the previous owner installed these tones and removed them before returning it but never brought the truck back to factory specs. We noticed the problem when we were towing a large trailer and the truck sagged terribly. Attachment was easy and now the truck can easily handle a full load of body and trailer. It's a little harder driving with an empty truck and no trailer, but he says we can remove the seal to fix the problem. Very satisfied.