Well I don't know how much it really helps 1/4 mile but with the stock air box. I would only chirp the tires off the line. and after installing the injen cai it will peel for about5-8 feet. I noticed that it pulls a lot harder from 20-60 also. Worth 250 imo. Thanks, Jared

 

Hey where in Kansas do you live? I may be moving to Lawrence in July.

 

I live in great bend. 3-4 hours away