Last year, Nissan solicited social media feedback to build the ultimate track-day 370Z, an event it dubbed “Project 370Z.” The idea was to gather the knowledge of Nissan Z owners and fans, then use readily-available aftermarket parts to construct a seriously fast 370Z.

To bump output from the stock 332 horsepower to “over 500,” the build includes a Greddy twin-turbo kit; a Greddy Turbo exhaust; an AEM engine management system; a CSF radiator and a Nissan Motorsports oil cooler. Nismo parts are used for the clutch and flywheel, and a Nissan Motorsports Wavetrac helical LSD maximizes traction at the rear wheels.

Underneath, Project 370 gets KW Variant 3 coilovers; Nismo S-Tune sway bars; StopTech brakes; Volk TE37SL wheels and Yokohama Advan Neova tires. A Nismo aero kit and a a vinyl exterior wrap (in a theme called Metalloy) finish the Project 370Z’s outside.

Inside, the car gets AEM digital gauges; custom Recaro seats; an Alcantara-wrapped steering wheel and Alcantara door panel inserts. The project’s primary focus was to build a faster and better-handling Z, but it’s clear that occupant comfort played a role, too.

Now that the completed Project 370Z has made the rounds on the show circuit, Nissan is throwing down against its fans. If you think you (or someone you know) has a Nissan Z that’s faster, Nissan wants you to prove it by registering on its Nissan Performance Facebook page.

One lucky winner will be chosen to go head to head with the Project 370Z, in their own Nissan Z, in a series of challenges to be held at the Las Vegas Motor Speedway next month. Nissan provides round-trip airfare and hotel for the winner and a guest, arranges shipment of the winner’s Z and fronts $5,200 in cash as part of the Project 370Z: The Challenge prize package.

In exchange, the winner signs a stack of documents acknowledging that racing is dangerous to man and machine alike, and that Nissan won’t be paying for things like a blown engine or body damage.

The contest is held in conjunction with Motor Trend, and you’ll find complete rules and entry requirements for Project 370Z: The Challenge on the magazine’s website.