RENNtech HHT ECU Upgrade for G 550 (W463- 402 HP / 405 LB-FT) mercedes-benz-e-class-sedan--211---2003-2009--e63-amg-esr3705573 RPM Tuned: 508 HP |

RPM Tuned: 508 HP | 512 LB-FT

All of our designs are unique and fully developed in house by our skilled engineers and designers

Finished off in a high-gloss UV protectant coating and assembled with custom Titanium hardware

This type of tooling has optimal durability

CLASS C (W 203) 230 Kompressor 2

RENNtech HHT ECU Upgrade for G 550 (W463- 402 HP / 405 LB-FT) mercedes-benz-e-class-sedan--211---2003-2009--e63-amg-esr3705573 RPM Tuned: 508 HP |RENNtech ECU Upgrade for 463 G 550. Up to 402HP and 405LB 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