Three or four years ago, a member did a series of dyno pulls using everything from a stock air intake system to a silicone hose with high performance air filter. I do not remember his screen name, but you can do a search. His best improvement was with the silicone hose and high performance air filter. If I remember correctly, he gained about 5 horsepower. The cold air intake taking in hot engine air was the least effective. I wish I could remember his screen name, but do a search or maybe another member will remember him.
