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While the McLaren MP4-12C Spider is a definitive supercar which could rival the likes of Lamborghini Gallardo or a Ferrari 458, the Renntech-tuned Mercedes AMG GT-S stands up to it pretty naturally. The tune brings the GT-S up to about 600 horses, effectively leveling the playing field. While there’s no way the Mercedes could outright tear away from the McLaren, it puts its power in perspective by getting just close enough to stay competitive.