Well learn from my mistake (not universal, just what happened to me). I purchased a very similar intake and in the end it screwed me. When I got my car is idled and revved perfectly. I couldnt have asked for a better running car. Well it had the "stock" airbox (found out later that it was a gutted box with a K&N panal filter) that I thought looked like crap and was hurting the performance. So I prchased a true cold air intake to help clean up the bay and improve my performance. All I ended up with as a searching idle that hung during high revving. Took me almost two years to figure out that the bend in the intake pipe was totally messing with the mass air sensor. The turbulance from the bend (and possibly the ACT sensor that was relocated to the intake tube) was messing with the sensor and causing the searching, surging, and hanging idle. Some ppl get away with it, but if you start to experiance these problems be aware the the CAI could be your problem