Re: installing dual exhaust on a 2006 GM
Actually its all bolt on parts and something you should be able to do in a couple hours. all you need is the H-pipe, drivers side muffler, muffler hanger, tail pipe, tail pipe hanger and maybe a couple clamps. you can probably buy all the parts from the local parats store, such as Advance, Auto Zone or Napa.
the computer doesnt have to be re-calibrated for it, but some sort of hand held tuner would really wake the car up.