What we have here is a case of extreme horsepower, and it all came to the streets of Chicago. It's best for a bit of road testing like this to happen at night when the streets are literally empty. With two modified Nissan GT-Rs on hand, one with over 700 hp the second with some 800 ponies, as well as a 600+ Corvette Z06 and a Porsche 911 Turbo, things definitely became, well, pretty damn loud. And fast. Our friends over at 1320video covered the entire thing during their trip to the Windy City. So which of these four is the fastest?

Remember, all are modified to some capacity despite having stock-like appearances. It's what's under the hood that counts most here. So kick back and enjoy some nighttime street racing direct from Chicago.