GFB Patented Sound Adjustment System 

Hey bro!! I also have a VA WRX (2020) with the GFB valve. I ran atmospheric as well and honestly think 50/50 ran best.

What does 50/50 sound like? Does it sound anything like vta

Hi Nigel, Our lifetime warranty will cover any issues that are being caused by the valve. Since our products are designed to last a lifetime, we don't have specific repair kits. Can you send us an email at support@gfb.com.au with some further details of the issue? One of the design engineers will get back to you asap. Thanks!

Flutter puts wear on your turbo, you don’t want flutter unless you want to buy a new turbo prematurely Edit: it sounds great though :)

Hi Sean, no - you will NOT need to retune your vehicle after adjusting the venting bias of your Respons. However, when venting to atmosphere, it is critical that you correctly adjust the spring preload screw to ensure that the piston is able to return back to a closed position returning to idle RPMs.

Hi Red, We don't list the DVX as suiting the Honda as we had some issues in testing with the way the Honda controls the valve from factory. It may work in some cases however we have high standards for these parts and want them to work flawlessly so unfortunately we decided not to list the Honda as a fitment.

Hi Benz, great question. No, you will not need to retune your vehicle after installing one of our blow off valves. You would simply tune the valve to your vehicle instead.

Hi, you will not need to retune your vehicle after installing one of our valves. You would simply need to tune the valve to your vehicle instead!

The fluttering sound you hear from some cars is compressor surge. This happens when the valve is not venting sufficient air, or possibly not working at all. There are ways to modify a valve to cause this, but it's not what they are designed to do and we don't recommend it

The differences between the two products just come down to the adjustability of the sound. The Hybrid can be set up as either re-circulating, atmospheric, or 50/50. Adjustment is done by installing and removing fittings. The Respons can be adjusted to anywhere in between re-circulating or atmospheric, and adjustment can be done quickly and easily by rotating a ring on the valve. No tools or extra parts are required to adjust this. Having the valve be adjustable to any ratio means on cars with sensitive MAF sensors, you can have the valve as loud as possible without causing issues to how the car runs

We don't have any valves with the sound adjustment system suitable for the N55 engine