Mach 2 DV to Blowoff Valve Conversion Kit (for T9120) [5920]

MACH 2 Atmosphere Upgrade Kit – Convert from Recirculating to Atmosphere Venting

Includes:

• Trumpet for enhanced sound
• Firmer spring (6115) for optimal performance
• 20mm hose plug to block the recirc hose

The 5920 Atmosphere Conversion Kit allows you to vent the Mach 2 to atmosphere by ensuring the piston stays closed at idle and plugging the recirc hose. This kit includes a 20mm hose plug, a trumpet to replace the hose outlet (amplifying the sound), and a firmer spring (6115) for proper operation.

The Mach 2 comes standard with a softer 6116 spring, ideal for recirculating setups or cars with an idle vacuum of 18inHg or less. If the piston remains closed with the stock spring, no change is needed. However, if it hovers open at idle—even with maxed-out pre-load—the firmer 6115 spring should be installed to prevent stalling or backfiring.

Compatible with: T9120

FORD AUSTRALIA TX3 KF-KH 1.8 BPT 90-93
FORD AUSTRALIA Ford Laser TX3 KC-KE 1.6 B6T 87-90
SUBARU Impreza 2.0 Turbo GT EJ20T MY94-00
TOYOTA Supra JZA80 3.0 2JZ-GTE 93-02
TOYOTA Supra JZA80 3.0 2JZ-GTE 93-02