Maybe 10 on its own. With other mods like a bigger throttle body and exhaust it will help out more.
what year
30ish, depending on octane levels and type of plugs.
From 5 to 10 horsepower.
10 horsepower.
about 2 wheel horsepower
not much. between 2 and 5 if you are very lucky. ohh and sticking a huge opening at your tailpipe isn't gonna give you anything either.
The cold air intake may add 5-10 hp to the 335 it was built with.
The V6 - 2000 Ford Mustang is 190 horsepower
225 horsepower
about 145 horsepower
320 Horsepower
260 Horsepower