7.0-litre, 625bhp RUFFIAN Mustang + 580bhp RUFFIAN GT40

Having been obsessed with both Seventies Mustangs and hairy chested Trans-Am racing, Chris Ashton – co-founder/design director of video game company Turtle Rock Studios – wanted to hand-build himself an old school race-car for the road. But with Chris being a keen autocrosser, it had to be functional. This Mustang runs massive rubber – 315mm for the front and 345mm out back, all wrapped in super sticky Toyo R888R track tyres, which Chris had to hand form three-inch steel fender flares for the bodywork to make them fit. It also runs a carbureted LS427 – GM’s aluminium-blocked 7.0-litre beast, now making 625bhp and around 560ft lb of torque.