Home / Make/Model/Year/Engine/Fuel / Audi / A4 / B6 (2002-2004) / 1.8T / Quattro Quattro Gift card $10000 out of 5 $1,000.00 Gift card $5000 out of 5 $500.00 Gift card $2000 out of 5 $200.00 GIAC Stage 2 software upgrade0 out of 5 $631.25 GIAC Stage 3 K04 software upgrade0 out of 5 $796.63 GIAC Stage 1 Plus Audi A4 B6 ECU upgrade 1.8T0 out of 5 $500.00