Gemballa was the first to reveal new aftermarket parts for the McLaren P1 in the form of a new set of alloys, but German Special Customs gets the crown for creating the first comprehensive styling and performance upgrade for the British hypercar. McLaren only made 375 P1s, so that's the number of GSC's potential customers. The tuner is hoping to get their business by offering an in-house exhaust with two round fighter-jet style 100 mm pipes that helps boost output from 903 to over 1,000 hp.

More power is coupled with an aerodynamic body kit consisting of a new spoiler blade, front apron side blades with LED DRLs, and bigger air inlets. There's also new side skirts, adjustable rear wing, roof-mounted scoop, rear diffuser and side air inlets. Pricing and availability can be gleaned directly from GSC.