German tuner IMSA has created a power package for the Mercedes-Benz S63 AMG Coupe.

German tuner IMSA has created a power package for the Mercedes-Benz S63 AMG Coupe.

The aftermarket specialists used a 4MATIC all-wheel drive version and haven't fiddled at all with the exterior design but they did replace the standard rims with their own 21-inch forged lightweight alloy wheels wrapped around in 255/35 R21 front & 295/30 R21 rear tires.

The most important change has occurred under that long hood where the V8 5.5-liter twin-turbo engine has gone through some software tweaks and received new sports air filters, modified x-cross central muffler for the exhaust as well as optimized turbocharged outlet, intercooler radiator and an improved air flow rate.

All these changes have increased output of the engine from the series 585 HP (430 kW) and 900 Nm (664 lb-ft) to no less than 720 HP (529 kW) and a peak torque of 1,080 Nm (796 lb-ft). Performance details have not been disclosed but it should be significantly quicker than the stock car which needs 3.9 seconds until 62 mph (100 km/h) and is electronically-capped at 155 mph (250 km/h).

IMSA says in the future they will roll out more tuning packages for Mercedes-Benz models, especially for those wearing the AMG badge. The S-Class Coupe will soon receive some power upgrades along with a custom aerodynamic body kit.

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Mercedes-Benz S63 AMG Coupe upgraded to 720 HP by IMSA