RENNtech ECU HHT Upgrade for GL 450 (X164- 402 HP / 405 LB-FT) mercedes-benz-s-class--220---1999-2006--s-500-esr5150893 greater exhaust gas volume and

greater exhaust gas volume and better sound

0L V6 BiTurbo) Modified Performance:

Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC+ vehicles

Up to 635HP and 620TQ

2 Year Limited Product Warranty

RENNtech ECU HHT Upgrade for GL 450 (X164- 402 HP / 405 LB-FT) mercedes-benz-s-class--220---1999-2006--s-500-esr5150893 greater exhaust gas volume andRENNtech ECU HHT Upgrade for 164 GL 450. Up to 355HP, 353LB FT. Gains: +20HP & 14LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning software