I have the big 2 inch to 2 1/8 TTI headers on my Duster. It has taken some time to figure it all out but I think I have a system now that allows me to take the car apart and put it back together. I had to build some tools and fixtures to make it all happen. Basically the front suspension has to come off and then the headers come out the bottom. Or you can drop the entire engine and trans out the bottom with the headers attached.