ok yeah i understand your support for headers after seeing your mods in the other thread. i just wanted to point out that near stock they have been tested to do virtually nothing until your already makin good power on a 6
Well yeah I understand that, the MAC S/T I have, have a barely bigger (if at all) opening and exit ports. I have mine smoothed out inside and shaved alittle bit off of the openings 'cause the weld job on them was kinda crappy.