I recently installed an aftermarket cam in my 06 SRT8 charger and ran it catless for 1 week. Smell at idle was pretty bad. Installed 3" Magnaflow spun metallic high flow cats and the smell is now gone with no loss in 1/4 mile performance.
Good info! I've go a set on the way. They were just under $110 each, and slip fit to my collector flanges on one side and into the shortened pipe on the other.