W2 408 Dyno results today !

I thought he said 1 7/8 TTI headers.
I'll have to re read,I though it was with 1 7/8 on the dyno. Whether his or theirs, if both @ 1 7/8...I wouldn't expect it to make a giant diff aside from collector size and length..but that's just what I'm thinking...and not end all.