High Flow Bellows
But I couldn't say for sure. Your question was kind of hard to understand.
When I used to have a 3/8 " plate I ground that much off my alloy elbow, to keep it all the same. As it made it tight and run into the rad mount at the bend.
When I went away from the plate, my elbow silicone coupler at the TB still had a little gap so I pushed up tight and you would never know that I had a plate kit on it. It all still lines up fine. So I think the trim was a good idea for me.
Hope this helps
Dub

When In Doubt Do Without



