I contacted PPE Engineering by e-mail when I couldn't find a price on their site for either set of downpipes. The 20% discount is no longer available, except for one lucky person who will do a before and after Dyno check, but I still don't know what the new price is.
Based on my NESHO mid-pipe, I am sure that downpipes will gain you some extra HP, but how much is still unknown, and will the NESHO mid-pipe help more, help less, or hurt the downpipe increase.
Also wondering how much extra sound, and if there's any drone issue.
My NESHO pipe sounds good outside and in the front 2 rows, but is annoying in the third row.
Guess we need more data. I have decided to wait.