"cold air intake" piping size

Don't compare free airflow area of the 2x3" pipes to the recommended flow area of an air filter; it's apples and oranges. And the free flow area of 2x3" is around 3 times the area of the carb throats. If it bothers you, adapt up to 4" as soon as you can. It might lower the pressure drop by a tenth of an inch or so.....