RENNtech Intermediate ECU Upgrade - E 550 Coupe BiTurbo | C207 | 480HP/523 LB-FT | M278 Engine | MY2012-2013 mercedes-benz-amg-gt--190---2015-2022--amg-gt-black-series-esr5041102 CLASS S LONG (W 221)

CLASS S LONG (W 221) 500 Blue Efficiency [2 Filters Required] (HP: 435 | Year: 11 > )

Our sound and performance x-pipe is constructed of high quality stainless steel with power proven x-pipe crossover design allowing for free flowing exhaust with less backpressure and greater performance

+85 HP / +103 LB-FT

SL (R230) 65 AMG [2 Filters Required] (HP: 612 | Year: 04 >)

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RENNtech Intermediate ECU Upgrade - E 550 Coupe BiTurbo | C207 | 480HP/523 LB-FT | M278 Engine | MY2012-2013 mercedes-benz-amg-gt--190---2015-2022--amg-gt-black-series-esr5041102 CLASS S LONG (W 221)RENNtech Intermediate ECU Upgrade for 207 E 550 BiTurbo. Up to 480HP and 523 LB FT. Gains: +78HP & +80 LB FT Our intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for