Hey CL, I'm pretty much writing this to re-assure people who have the hks hi power and were thinking about getting a mid pipe that it IS livable for everyday driving!
Alright, so if you're an hks hi power owner, you'll know how loud and how much drone there is in the cabin on the freeway and streets. When I first got my exhaust, it came with silencers but I took them out. About 6 months later, I got the invidia mid pipe and it was death to my ears today I put the silencers back in the exhaust and all I can say is WOW!! The drone has been reduced almost completely and is very livable! If you're a hi power owner and are debating whether or not to get a mid pipe based on drone, GET IT. All you need is silencers and you'll be very happy. If someone wants me to post pics of the silencers, I can do so. Hope this helps anyone stuck in a pickle
- Alex

 

Very useful information! Thanks for posting! (y)

 

^^ glad it helped!