When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I know O2 sensor cross talk is a debatable issue but a short extension should rule it out it. Does it have to be as long as the one you show to separate the flow?
I did almost the exact same mod with my stock exhaust except I used a flat piece to eliminate cross talk. I had good results, not a waste of time at all.