Last year Mercedes tuner Renntech set about ending the confusion by boosting the output of the supercar to 722hp (538kW) – up from the regular 722’s 650hp (485kW). The original PKG1 kit included upgraded intercoolers, a larger crankshaft pulley, and custom ECU software to reach that power level.
The Florida-based tuner has now released its PKG2 kit and this time power has been boosted to 740hp (552kW) at 6,400rpm. The car has also been given a slight visual update with Signature 10 spoke wheels in SLR offsets and 3 finishes.
