RENNtech ECU+ Upgrade | W166 | GLE 450 SUV | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 mercedes-benz-sl-class--231---2017-present--sl65-amg-esr6416839 Matte Finish

Matte Finish

Gains: +98HP & +140TQ

ceramic coated  long tube headers feature top of the line big tube 2" diameter T-304 stainless steel tubing

GT 53 AMG (X290 -chassis)

Rated by RENNtech (peak @wheel):              665 whp @ 5

RENNtech ECU+ Upgrade | W166 | GLE 450 SUV | 392 HP/463 LB-FT | 3.0L V6 BiTurbo | M276 mercedes-benz-sl-class--231---2017-present--sl65-amg-esr6416839 Matte FinishECU+ Upgrade Up to 392 HP 463 LB FT Gains: +30 HP & +84 LB FT RENNtech tuning products are certified to meet CARB standards in all 50 States. RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock