:I disagree that you won't add horsepower. If done right, it'll add at least 20 HP at the top end of the track. With the stock air filter/housing in place forget about any increases. To gain the use of this free HP, you need to build a plenum box that "seals" the hood scoop opening to the carb. In effect, it's like having a supercharger at higher speeds. Let me know if you want details and pictues of the plenum box I made.