RENNtech EVM | Exhaust Valve Module | 172 - SLC 43 AMG; 253 - GLC AMG Models SUV + Coupe audi-a6--c5---1999-2005--4-2-l-v8-esr1955596 RENNtech ECU Upgrade for 207

RENNtech ECU Upgrade for 207 - E 550 Coupe BiTurbo

CLASS C (W 204) 350 V6 4-Matic Blue Efficiency (HP: 306 | Year: 11 > )

GLE 450 (MY2016+ | W166 | M276 | 3

ECU+ Upgrade | GLC 63 AMG S and non-S | Up to 601 HP / 644 LB-FT | Gains: +75 HP & +113 LB-FT

RENNtech EVM | Exhaust Valve Module | 172 - SLC 43 AMG; 253 - GLC AMG Models SUV + Coupe audi-a6--c5---1999-2005--4-2-l-v8-esr1955596 RENNtech ECU Upgrade for 207RENNtech Exhaust Valve Module Permanently Open Exhaust Flaps. 172 SLC 43 AMG; 253 GLC AMG Models SUV + Coupe EVM Exhaust Valve Module (Remote Controlled) NOT SO FUN FACT: If your Mercedes AMG is equipped with factory exhaust valves, with or without a center console button to open or close them, factory settings do NOT allow the flaps to fully open unless certain speed and or RPM have been reached. For example, while cruising the exhaust flaps will