I honestly don't think the drone in either is that bad. It was less noticable with the stillen in my opinion. Everyones opinion is a lot different though. Like I said, try to hear them in person

 

I still can't even decide between Fast Intentions and HKS. I love the stock exhaust note, and I really just want a louder version of it, but I've heard so many good things about the HKS. Argh...

 

what about borla?

 

Same issue but I went with FI becasue customer service is a big thing for me and Tony was always there for my questions. I went with the HFC and the exhaust. Sounds great and I get so many compliments. The exhaust fits like a glove and no issues what so ever. Another thing the exhaust is made for you once you put in the order and not mass produced sitting in a box.