"cold air intake" piping size

4- 1 3/8" throttle bores are 5.936 sq/in
2- 3" tubes is 14.13 sq/in
the choke seems to be the 12.6" x 3" filter
Specter has 3" tubed air cleaner boxes also, so no adapting.
unless your at 6000 rpm all the time, dont see an issue. JMO.
I'm working on a similar system.