Make Model Engine Year Notes
AUDI A4 V6- 3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream
AUDI A4 QUATTRO V6- 3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream
AUDI A6 V6- 3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream
AUDI A6 QUATTRO V6- 3.0 2004-2002 2Pcs Upstream + 2Pcs Downstream
AUDI ALLROAD QUATTRO V8- 4.2 2005-2003 2Pcs Upstream + 2Pcs Downstream
AUDI S4 V8- 4.2 2009-2004 2Pcs Upstream + 2Pcs Downstream