The Volkswagen Transporter / Multivan 2.5 TDI 88hp (T4 - 1999 - 2004) produces 88bhp and 195Nm in standard form. Our Stage 1 ECU tuning file raises output to 115bhp and 240Nm, a gain of 27bhp and 45Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.