Road racing videos can make it hard to gauge relative speed, especially in time trial runs. Because Brian Faessler drives his monster Ford Mustang so smoothly in this video of his lap-record run at Watkins Glen International last weekend, it’s hard to grasp just how insanely fast the car is running. Faessler’s wicked lap at Watkins Glen came during the Time Trial-Unlimited (TTU) competition at the NASA Eastern Championships and the 1:48.682-second circuit smashed the previous lap record by an incredible 7.5 seconds.

Faessler’s top speed is an amazing 183 miles per hour just before braking for the famed Inner Loop section of the track. That’s considerably faster than NASCAR, who only run the shorter Watkins Glen course, and his lap time is also much quicker than a GT4-spec car. In fact, it’s closer to the GT3 cars that run IMSA’s GTD class than it is to the GT4. With the telemetry measuring almost 2.0 lateral G, this thing has more than power, too. You might guess that we’re not talking about a stock Mustang here and we think Faessler has a similar turbocharged setup that he did in his 2007 Mustang that raced with NARRA.

Faessler wasn’t the only driver to break the previous record; two other drivers went quicker than the previous 1:56.158 lap: Rick MacPherson ran 1:51.583 in a 2012 Nissan GT-R and Ray Sweers knocked out a 1:55.035 lap in a 2006 Dodge Viper.