Carbon Fiber Airbox | SUV M177 | 4.0L V8 BiTurbo | Satin & Gloss Finish exhaust R231 - SL63 AMG FaceLift

R231 - SL63 AMG FaceLift MY2017-present

000RPMwith peak gains of +336 HP and +358 LB-FT

RENNtech downpipe

The diffuser assembly also features a unique acrylic coating process which protects the carbon fiber from any harmful UV and humidity degradation

Our intermediate ECU tune increases performance from 556 HP and 550 lb/ft torque to 638 HP and 695 lb/ft at the crank

Carbon Fiber Airbox | SUV M177 | 4.0L V8 BiTurbo | Satin & Gloss Finish exhaust R231 - SL63 AMG FaceLiftPerformance testing shows that the OEM air boxes on the M177 V8 Bi Turbo engine become a constraint when power output is increased through performance ECU software, exhaust, and turbo upgrades. RENNtech M177 Carbon Fiber Airboxes solve this problem through increased volume and airflow. Substantially larger than stock and a symmetrical design that delivers over 30% more filter area allows the engine to perform at the highest level in both stock and