I performed the air box mod listed in the TEchnical Articles this weekend. Very easy to do. I think I feel greater acceleration, but hard to tell. The article said I would hear a louder whistle, due to the increase in air, but there is no addtional sound. Maybe my K&N filter needs cleaning. I'll be checking my mileage the next couple of weeks and repost. Right now I averaging about 13.3 here in Austin traffic. Does anyone believe that performing the MAF mod will help further, acceleration or mileage. Let me know please.