Let me check in my attic. I've got a top mount setup with the stock BOV still on it, and I just might have kept the fugly DSM flange. I know I
thought about keeping it... just can't remember if I followed through.
Anyhow, if I do have it, I can double check to see if it is the same. Furthermore, you can have it for the cost of shipping (it's really ugly) if I do.