https://www.ebay.com/itm/136387784150
have at it. A cheap way to figure out if you really need a sneeze valve, or not...

installs in maybe 30 minutes. no special tools. easily reversible.

 

If anyone is wondering, I found it caused no issues (or error codes) while driving, and also, changed nothing after I removed it. Not faster shift, slower shift, laggier, etc, either way.
I just prefer not to hear blow off valves.

 

This is how much these sell for new. (almost $1000)

https://www.vividracing.com/blackboo...QaAtxqEALw_wcB

Lowered reserve on auction and the buy it now price. Auction ended, so I re-listed it

https://www.ebay.com/itm/136454891242