I don't know. All i've been hearing about the berk is good things, but when i ask why, the answer seems the same....it's got an APEXi filter! If that's the only reason why it's that good, that just isn't reason enough for me 2 believe the hype. You can just buy a midpipe and buy the APEXi filter and have the same thing basically. I've had the Stillen WAI, a custom CAI, and now I have the INJEN CAI. The Stillen is good if you're into the WAI idea, it's nice and loud and did give a good performance gain. My custom CAI, I actually used the Stillen filter and adapter to make the CAI, it gave me the best low end-mid range power I've felt in the QR's. Now I have the INJEN, yes I lost low end, but I gained everywhere else. So you be the judge. And yes the Berk is cheaper than INJEN, but if you're willing to spend the extra amount of $, I say go with the INJEN CAI. I am not doubting the Berk intake because I haven't experienced it 1st hand, and this is my own opinion. So judge 4 yourself w/ mine and everybody's opinion.