The last time we heard about the Sin R1, which is a monstrous Corvette-powered supercar, was back at the 2013 Goodwood Festival of Speed. At the time the supercar was a bit of a mystery. We were also concerned with the automaker's ability to turn into a full-fledged supercar maker and duke it out with the likes of Ferrari, Lamborghini and Pagani. A lot has changed since then and Sin has engineered a road-going model of the R1, which is being referred to as the R1 RS.