Mercedes-Benz tuner Renntech has developed a new performance package for the already potent SL65 AMG Black Series. The package includes ECU tuning, dual intercooler pump upgrade, and sport mufflers. After these changes the twin-turbo V12 pumps out 805 hp and 1000 lb-ft of torque. That’s 135 hp and 263 lb-ft of torque more than the stock SL65 Black Series.

Pricing starts at $16.390 and it is highly recommended that customers also go with transmission upgrade and limited slip differential.

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