Nice!! It turned out great.
Right he basically made a really big balancer tube. And btw a clamp on it soo much better then a box!
A balancer tube and a clamp will make more power then any box.......
Think of it this way, when air enters into a filter clamp on filter its coming from all dierections then right into the carb, so you get tons of air flow but its scattered. This makes jetting a pain and its will never be perfect, a balencer tube of 3-4" fixes that problem and atomizes the oxogen at the same time, meaning more power and easier jetting.
Heres my cheapo balencer tube