The PowerCore filter is a huge upgrade, and around town it sounds great. Install was a peach.
I experienced a loud drone at ~2k RPM, which meant cruising at 65-70 was painfully unpleasant for me. I was going crazy on the highway and lasted a week driving to work. I went back to stock.
I respect the policy of no returns after install - I’m just sad my ears can’t handle the drone enough to run this product, as it works great. Might try the stock intake tube on Volant's box/filter. I like to tinker.