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.
VW JETTA 2000 2001 2002 2003 2004 A4 Typ 1J 1.8 T AWD 2000 - 2004