Home / Make/Model/Year/Engine/Fuel / Porsche / 911 Turbo S / X50 / 996 (2002 - 2006) / 3.6 Turbo / All All GIAC Stage 1 Plus Porsche 911 Turbo S ® / X50 996 ECU upgrade0 out of 5 $1,800.00 GIAC Stage 3 GT28 Porsche 911 Turbo S/X50 996 ECU upgrade0 out of 5 $3,000.00