The GFB T9011 gave the car perfect bov sound and I don’t know if is me or not but the throttle response feels way better and smoother
GFB BOV's will hold boost better over OEM, the response is likely the replacement of the valve and stiffer spring pressure.
This thing sounds great when driving. I like the fact that you can control how much is recirculated and how much goes to the atmosphere. I recommend going for a test drive so you can make adjustments before putting the underbody tray back on. It really only activates when you step on it, so it’s stealthy when you need it to be and can be loud when you want to have fun!
Installation would have been much quicker if I had a flexible drill bit extender. It’s very tight down there, but that’s more of Hyundai’s issue. Also for the Veloster 1.6T gen 2 you need to go from the bottom. The whole thing will probably only take 20 minutes with the proper tools. The BOV/BPV is very well made, solid aluminum vs the stock plastic one. Definitely recommended to get for a quick easy mod and to have some fun.