One of the loudest valves in the GFB range can now also be one of the quietest - choose between silent and stealthy operation, or an ear splitting WHOOSH!...
One of the loudest valves in the GFB range can now also be one of the quietest - choose between silent and stealthy operation, or an ear splitting WHOOSH!
The Mach 1 and Plumback valves have now been combined into one affordable unit - the new Mach 1 k...
The worlds first ADJUSTABLE NOISE BOV for street or track conditions at a twist of the wrist! Up until now, making your machine quiet for normal street use, has meant pulling your BOV off and putting it back on when you want track conditions...
