Ah gotcha good old MD. I'll be there this saturday with the HUMMER.

No I dont work for the USGS unfortunatly.

 

the problem is solved, the catalyst is ****ed up
Not easy to get a new i sweden. How much does e new one cost in USA

 

for a REAL mileage boost,,replace with a piece of pipe!!

find the right shop

 

Do a web search. Looks like new bolt on goes for around $700 USD. If you get a universal and if you can make it fit, it's around $100 USD.

Here's one on EBAY - A new bolt on:
MagnaFlow 23966 Catalytic Converter 2006 Hummer H3 3.5L
http://cgi.ebay.com/ebaymotors/Magna...-/190412413056
$247.10 USD

 

Check you may be covered for a free replacement. In the US we have a 8 years/80,000 miles warranty on the catalytic converter.