K&N for marginal breathing enhancement not better filtration.
The underhood is extremely hot, hence I prefer this set-up which takes in cool air like the oem set-up from the front, than the dual cone filters that breathe hot underhood air.
My advice is not to invest too much mod money in this car as a track car. Who knows, you may want a significantly lighter car in the future e.g. such as a vette .....
SB, Terra, 6MT. Only a few mods here and there.....nothing extreme!