[Johnny Danger]

Originally Posted by The Radium King

yup, and a lot of that has to do with tuning the exhaust to maximise exhaust gas scouring at lower rpm, improving low rpm flow efficiency while maintaining backpressure, etc., all of which supports locating the cats further downstream and improving the headers.

ps, the quote about both cats being 400 cell was made by JD in a thread from about a year ago, so caveat emptor to all.

http://986forum.com/forums/showthread.php?t=25644&highlight=600+400+cats

Since that thread, further research and discussion on the topic lead me to discover that the secondary cats were 600 cell . I've always been someone who strives to enhance his knowledge about things. Particularly, when there seems to be a lack of reliable information . And, by doing so, I am able to better understand what it is that I am dealing with (in this case my vehicle), and hopefully be able to pass on what I have leaned to others .