im in Rockville MD. does anyone know the differences between the auto and manual exhaust systems if any? ive been searching around but have not found an answer.
im working with a local reputable company on an exhaust system for the hhr ss and need to make sure there are no differences. any help would be appreciated : )

The downpipes are different..other then that the same...dont remember which , but one is a couple inches longer due to the eng positioning..there are several threads here that address this...the shop can cover the differences with no problem..

Hi. I'm in Laurel, MD. Any meet-ups?