RENNtech | X290 | AMG GT63 | Side Skirts | Carbon Fiber | Gloss Finish porsche-911--992---2018-present--targa-4-esr9249197 the factory settings do NOT

the factory settings do NOT allow the valves to fully open unless certain speed and/or RPM have been reached

while cruising the exhaust flaps will never fully open

The maximum power number reached with the RENNtech ECU Plus Upgrade for the C205 - C 43 AMG Coupe is 416 HP and 460 LB-FT

Rated by RENNtech:               605 HP @ 5

+114 HP & +100 TQ

RENNtech | X290 | AMG GT63 | Side Skirts | Carbon Fiber | Gloss Finish porsche-911--992---2018-present--targa-4-esr9249197 the factory settings do NOTRENNtech X290 AMG GT63 Side Skirts Carbon Fiber Gloss Finish The RENNtech Side Skirts are 100% pre preg carbon fiber and developed to complement the full RENNtech AMG GT63 aerodynamic program. Designed, engineered, and tested in house at the RENNtech headquarters in Stuart, FL and manufactured in Germany. Created using state of the art 3D CAD programs and analysis tools with multiple levels of revisions to refine the product and achieve an OEM level