Copy and paste the link below in a new browser. It is the link to California
Bureau of Automotive Repair emission cut score application. There you will
be able to select your 2004 Jeep Wrangler and follow the chart to find what
the maximum amounts of HC, CO and NOx your Jeep Wrangler can produce and
still pass the California smog check.
http://www.autorepair.ca.gov/pubwebquery/cutpoints/ShowMake.aspx