I have a 1990 Chevy K2500 pickup and had my muffler replaced at the shop many years ago... and I lost the lower section of the rear suspension. I could probably fabricate something, but it was much easier and cheaper elsewhere. This works on trucks equipped with a muffler that has two 2.25" exhaust ports and a frame-mounted fitting that it plugs into. It is not shown in the picture so turn it over and insert the formed round piece into the frame holder and place the flat piece under the exhaust