We know that Mercedes used the SLR 722 badge on the SLR McLaren 722 Edition to honor the 1955 Mille Miglia-winning Mercedes-Benz 300SLR of Stirling Moss and Denis Jenkinson, but still. That car, wearing a big "722" on the doors, which indicated their 7:22am start time, managed to beat the favored Porsches and Ferraris back in the day. But people see a 722 on the label and somehow 650 hp doesn't seem good enough. Enter, supertuner Renntech.

Renntech takes the supercharged 5.5-liter V8 that resides in every SLR and adds some of its magic. This time it's a simple application of one of the company's upgraded intercoolers and a new intercooler pump. These revised units have twice the capacity of the stock coolers and reduce temperatures by a full 50 degrees. The result is horsepower that now hits the magic 722 mark. No price is listed for the conversion, but it sounds like it could be a real winner with the few customers lucky enough to have a 722 parked in their garage. We could do without the aftermarket wheels though.

[Source: MotorAuthority]

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