Best tune for Emissions test

[soutthpaw]

Well I went to register my truck and found out the county still requires an emissions test for diesel engines even though they no longer do gasoline emissions testing... Futher more the outdated test they use is the old opacity testing.. I know my truck will pass on probably any tune except the smoke show as the test is basically obsolete since direct injected, computer controlled vehicles came on the scene... but that's government for ya! just a way to milk another $50 out of me. I know I'm gonna kick it over to smoke show when I leave the emissions test facility
Anyway it got me to wondering which tune is the best for emissions tests... I am thinking the Fuel Sipper but maybe there is a better choice?