They fitted a 1972 Chevy C/10 5.3 Rebuild. They fit with plenty of room between the frame rails, which is great for this particular application. The pipe flanges that come with the kit are just flanges and you will need to weld the pipe to them and Hooker recommends that you have a stainless steel welder. In my case I didn't do that so I made my own design for the pipe, I flattened the pipe (with a pipe bender) and used Walker exhaust pipe gasket #31334. I used factory gaskets to attach it to…