Very high quality parts as expected from GFB - it's great having the option to hand-adjust the valve to modify the sound HOWEVER the mounting point for the BOV is difficult to reach if you have an intake system with box and you will need to remove the box/filter area each time you want to adjust it. If you are planning to set and forget this system is great quality with a 15 minute time investment when you do want to adjust. If you want to adjust more frequently - consider the ease of the Deceptor electrically adjusted one for the little bit extra. In hindsight that would have been my choice even though I won't be adjusting constantly.
For those wanting this for the sound - no matter what you may think about volume this thing is LOUD if you have more of a bias towards venting to atmosphere. A good level that doesn't overpower the other sounds your car is making is roughly about 10-20% venting otherwise it's so much louder than your exhaust and induction sounds which is unbalanced. If that's your thing go for it - just be aware that people aren't kidding about the volume.
Overall - fantastic addition to any i30N for a high quality part with adjustability - just be aware of the volume and the ease of access (or lack thereof) for the part.
