Has anyone split the flanges and switched to slip on "y" collectors on FPA Mustang headers? One piece headers are a real pain to remove and install so if they can be split into two pieces I would think the job would be easier. If I ever take the FPAs off I might give this a try.
I did this to a set of street Hooker headers years ago and it worked well. They didn't have enough ground clearance though on a lowered car.