They used a Flowmaster 50 series suv muffler from a Denali or Esclade. It comes with the an adaptor pipe to make it fit properly. Seems that the factory muffler they use for the H2 is the same for the gm trucks and suv's over the gm product line so the fit was almost perfect. As I said its not a bolt on part and does require welding but it works and looks great! In fact it looks like a stock install. I will get some pics of the install soon and post them here. No more rattle and poping from the stock muffler that the dealer replaced three times. And I say again $200.00!!

First American Properties Inc. 916-858-2383
White 03-H2-LUX