GFB Mach 2 Plumb Back to Atmosphere Vent Conversion Kit Universal

GFB Mach 2 Plumb Back to Atmosphere Vent Conversion Kit - Universal

GFB built the Mach 2 blow off valve as a recirculating unit from the factory, but plenty of owners want that classic atmosphere venting sound without swapping the whole valve. This conversion kit gives you exactly that, letting you switch your Mach 2 from recirc to atmosphere venting with genuine GFB hardware rather than a generic workaround.

This listing covers the atmosphere conversion kit (SKU 5930) suited to GFB Mach 2 valves with part numbers T9100, T9101, T9102, T9104, T9105 and T9135. One kit suits all of these part numbers, so there's no variant selection required beyond confirming your Mach 2 is one of the listed types.

Important: The Mach 2 ships with a softer spring (part 6116) suited to idle vacuum of 18 inHg or less. If the piston hovers open at idle even with spring preload maxed out, fit the firmer spring (part 6115) included in this kit to prevent stalling or backfiring. If the piston already stays closed at idle, there's no need to swap the spring.

Kit Contents

• Atmosphere venting trumpet (replaces the hose outlet, adds volume)
• Firmer spring, part number 6115
• 30mm hose plug for blocking off the recirc hose

Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm which Mach 2 part number is fitted to your vehicle before ordering.

Not sure if this kit suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.