Watch This Modified 2023 Nissan Z Blast Past Its Factory-Rated Top Speed

Ever since the first leaked images of the 2023 Nissan Z arrived online, fans have been patiently planning out their high-performance aftermarket builds. Now that cars are starting to end up in customer hands however, the folks over at GReddy are finally ready to show off some of their tuning experiments. Thanks to a tweaked speed limiter, a modified exhaust and added boost pressure, the legendary tuners have just pushed a Z far beyond its manufacturer’s claimed top speed.

From the factory, the 2023 Z is capable of pushing 155 mph, according to Nissan. That’s not exactly a groundbreaking number, especially considering the 400 horsepower and 350 lb-ft of torque coming from the car’s 3.0-liter twin-turbo V-6 engine. Like many vehicles on the road, that speed limit is not actually created by a lack of output, but rather an electronic limiter placed into the vehicle’s ECU software. That means that tuners like GReedy have the ability to do away with such an annoyance and continue to push the car to its actual limits.

This particular test car belongs to the folks at Trust, and has already had the limiter removed. A prototype muffler from GReddy has been installed into the exhaust system, which brought a slight bump of about 10 hp. The video also makes note of changing boost pressure, but there is no mention of exactly how much more boost is running through the system. That said, the video does highlight a total output rating of just under 474 and 517 lb-ft of torque after a dyno run.