The Volkswagen Transporter / Multivan 2.5 TDI 102hp (T4 - 1999 - 2004) produces 102bhp and 250Nm in standard form. Our Stage 1 ECU tuning file raises output to 133bhp and 310Nm, a gain of 31bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.