K&N Air Filter
The freer-flowing, cleanable K&N filter may add slightly better
airflow than the stock paper element, but not so much that you could
feel it.
The main benefit I discovered was that the air flowing in through the
hood scoop attracted not only plenty of dirt but, strangely, lots of
bees.
The hood does have a very effective baffle to keep out rain, but make no
mistake, this intake will pick up more crud than a conventional
induction system.
This is the same filter that fits the LT1 Corvettes so availability isn't an issue.