I know, I know.... another "which piipe" thread...

After doing a few searches, and going through some of the 7000+ threads I found... Here we go again...
We may be building a TB117 for a street CRF application. Currently with the engine in a 108 configuration, we're running a Yosh. To me, visually, this pipe's header seems too small for a 117.
Your thoughts and recommendations would be very helpful...
Thanks...