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Optionally
Turn off the KnockBlock by turning the volume control anti-clockwise until it clicks
the un-reinforced rubber diaphragm can rupture
The VTA is a performance blow-off valve solution for Audi
Approximately 35mm Lower than OE
MACH 2 ATMOSPHERE CONVERSION KIT - SUITS T9120 - 30mm Blanking Plug - GFB 5930 cobra springs OptionallyMACH 2 ATMOSPHERE UPGRADE KIT TO CONVERT FROM RECIRCULATING TO ATMOSPHERE VENTING. Includes trumpet, firmer spring, and 30mm hose plug. To vent the Mach 2 to atmosphere, you need to ensure the piston stays closed at idle, and the recirc hose is plugged. The Atmosphere Conversion Kit includes a hose plug to block off the recirc hose, a trumpet to replace the hose outlet on the Mach 2 (not necessary for functionality, but makes the sound louder!), and a
