Description
This tune is for the GL550 – M278
Our in-house team of engineers is eager to ECU tune your GL550 – M278 platform. This ECU tune can make your already impressive GL550 into a literal street monster. Increases in horsepower, torque and throttle response will leave you with a smile on your face. You will be wanting more every time you get behind the wheel!
Our expert team of technicians has vast knowledge working on the GL550. We have recalibrated many of the factory ECU settings giving your GL550 higher performance while still remaining daily drivable & street legal.
SMS offers stage one, two and three files for this vehicle. Please contact your local SMS location for more details
