Few parts are more important than your muffler.  First, your Hummer muffler keeps the vehicle from running too loudly; averting noise pollution.  Second, and perhaps most importantly, the muffler prevents emissions, or exhaust fumes from entering the vehicles cabin.  If your muffler is not performing the way it should, you're at risk for exposure to exhaust fumes.  Emissions are especially dangerous to infants, the elderly, and people with heart or lung conditions.  One of the first signs of a failing muffler is louder than usual performance.  People living in louder communities like big cities may not even notice this change.  If, upon inspection, you determine that you need a new muffler; we've got you covered.  Whether you're looking for a replacement muffler or upgrading to a high performance muffler, you'll find what you're looking for in our online catalog.  Our user friendly setup ensures a quick and easy shopping experience.