GFB 5920 Mach 2 Atmosphere Conversion Kit suit GFB# T9120

To vent the Mach 2 to atmosphere, you need to ensure the piston stays closed at idle, and the recirc hose is plugged. The 5920 Atmosphere Conversion Kit includes a 20mm 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 firmer spring (part # 6115).

The Mach 2 is supplied with a softer spring (part # 6116) that is suitable for recirculation venting or cars with idle vacuum of 18inHg or less. If the piston stays closed with the existing spring in the Mach 2, there is no need to swap it out. However, if the piston hovers open at idle even with the spring pre-load maxed, the firmer spring in this kit should be installed to prevent stalling or backfiring.

Suits the following applications:

• TOYOTA Supra JZA80 3.0 2JZ-GTE 93-02 Note : Not direct bolt-on - requires modification to factory hoses
• SUBARU Impreza 2.0 Turbo GT EJ20T MY94-00 Note : Not direct bolt-on - requires modification to factory hoses to mount valve elsewhere in the engine bay
• FORD AUSTRALIA Ford Laser TX3 KC-KE 1.6 B6T 87-90
• FORD AUSTRALIA TX3 KF-KH 1.8 BPT 90-93
• TOYOTA Supra JZA80 3.0 2JZ-GTE 93-02 Note : Not direct bolt-on - requires modification to factory hoses