I think 5hp is a good estimate. Now if that was a monster sticker then you could claim an extra 30hp at about 6000ft. If you also add a boondocker sticker with the monster decal you will gain turbo level Hp's No hard parts needed.
I put a wrap on mine, and instantly noticed the difference by only starting it in the garage. WOW!!! I plan on putting a can on it, then I will be able to run in the Super Duper Unlimited Mod class.
Uhhhmmmm????? If I put a muff pot on, will I lose Horsepower?