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The GFB Mach 2 atmosphere conversion kit converts T9100, T9101, T9102, T9104, T9105, and T9135 Mach 2 valves from recirculating to atmospheric venting. By swapping the internal trumpet, spring, and plug components, this kit changes the valve’s behavior to vent to atmosphere for a different sound profile. It’s a focused retrofit for those specific Mach 2 models wanting atmosphere venting without replacing the full valve.
GFB Mach 2 Atmosphere Conversion Kit-Changes T9100/T9101/T9102/T9104/T9105/T9135 Recir to Atmosphere
