Hey everyone that comes by and read this. I search on fourms but couldn't find anything related to the issue my brother is having. So yesterday i help my brother install the injen cold air intake, took about 1-2 hrs, everything seem fine at first when we got done. We felt the power and the car pull more( when my bro steps on it, we would be push to the seats, lol) then after a couple hrs later, the car felt weak, no pull, and it doesnt feel the same as before like it got weaker. My bro is thinking about returning it, but i said give it a week, it probably has to break it a bit. So please any suggestion on why its like that, i would really appreciate your help. 
