GFB Mach 2 Atmosphere Conversion Kit (87089993)
MACH 2 ATMOSPHERE UPGRADE KIT TO CONVERT T9120 FROM RECIRCULATING TO ATMOSPHERE VENTING BOV.
CONSISTING OF TRUMPET, SPRING AND PLUG.
There is a harder spring supplied in this kit, as the valve needs to remain closed at idle when venting to atmosphere. This prevents stalling and backfiring.