Here's a pic or two. Will have to compile parts list.
You start with a HUGE CONICAL filter…(this was Stage1-notice MAF is by the filter)
Then move the MAF so that it is practically sitting on the Throttle Body (Stage2) - using the Honeycomb to straighten the airflow before the MAF & TB.
It is 4" until it drops to 3.5" at TB.
Enjoy! I sure am!