I've looked around and pretty much everyone says about 12hp. Hope this helps :)
nothing unless you reprogram the computer.
From 5 to 10 horsepower.
what year
10 horsepower.
about 2 wheel horsepower
typically at least 1MPG up to 3-4MPG a few and up to 30 HP in some instances
The cold air intake may add 5-10 hp to the 335 it was built with.
3...........
15 hp
you will get an extra 2 or 3 horse.
270 horsepower 300 with flowmaster duel exhaust, kn cold air intake, and skunk2 cams.
5 or 10 horse.