MACH 2 ATMOSPHERE UPGRADE KIT TO CONVERT T9107 & T9125 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.
AUDI A3 1998 1999 2000 2001 2002 2003 T 8L1 1.8 T AGU,AQA,ARZ,AUM 1998 - 2003