I dont have the stock hanger brackets, the only brackets I have are those that came with the kit, which obviously let the pipes hang too low. I was considering just cutting and modifying them to work. I think the biggest challenge will be to get the correct bends to make the pipe connect after I cut it. I want to try to do this myself but I may need to make a trip to an exhaust shop to have them bend some pipe for me
I do have holes going through the rear frame rails, and the flowmaster brackets bolt into those holes. I am not sure if they are the same holes the GT support brackets use, the car was originally an I6.