Style chooser

i am driving iswara 1.3 4g13 carb engine

i wna change better air filter or mod it.. so i have few options and hope u guys can help me with which is better? give some suggestion please

1)original air peper filter change to drop in air filter?(K,N an dsome other brand anyone knows? )

2)UFO type, i was wondering if i use UFO, i realize that..the metal thing will be extreme HOT! so.. the whole cold air intake concept is gone.. -_- and suck in HOT HOT air.... so... wonder how.

3)air ram to...