I recently noticed that the driver side down pipe is hitting my torsion bar. I measured the outside dimension of the pipe with a caliper and came up with 2 inch outside diameter. Everything I read is 2 1/4 inch or larger on a stock runner. With a 383 motor. The pipes are in good shape but if I replace these what diameter should I go with. Thinking of going with stainless steel pipes. All info would be appreciated. Not running headers using the HP exhaust manifolds. The rattle noise I here is from the pipe striking the torsion bar after running over a recap scrap of semi tire. Could not miss it was all the way across my lane. Duh.