RENNtech Carbon Fiber Airbox | M177 | 4.0L V8 BiTurbo motorsports 329 hp @ 5

329 hp @ 5

Gains up to: +54 HP | +52 LB-FT

curbs and steep driveways

The maximum power number reached with the RENNtech ECU Upgrade for the E63 AMG S 4MATIC+ is 773 HP and 778 LB-FT

RENNtech Carbon Fiber Airbox | M177 | 4.0L V8 BiTurbo motorsports 329 hp @ 5Performance 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