Thanks for sharing the Magnaflow info.

Earlier in this thread i browsed the Rockauto selection of 1993 cat cons and had the suspicion that some might be more effective than others, since the two brands that met the ridiculously tough California NOx specs were much more expensive.

I would guess that a "universial" cat con sold in 2016 might have much better NOx reduction than the original cat con from 1993