Who decides to do this and how do they afford it?

Now, this is something you don't see every day. Most heavily modified Nissan Z cars start and end life with one of two things: Rodney the Rod coming up from the hood to say "hi," or a big LS engine that actually makes reliable, everyday power with no forced induction. This swapped 350Z rather obviously, will end life without either of those scenarios ever occurring and went big on this swap.

The swap you are looking at is Bentley's twin-turbo W12 engine (used in cars like the Bentley Bentayga) wedged into the body of a Nissan 350Z. It might be the wildest Z-swap we've ever seen.

Gregor Performance Garage (GPG) out of Poland has birthed this one-off half-breed of British luxury and Japanese tuner car elements. The shop calls the car the '600Z W12TT' and it started life as most crazy builds do: as a far less crazy build, one with a 2JZ-GTE Supra motor in it. Just about the only surviving element from that build is the car's automatic gearbox.

Despite the big W12 being roughly the same length as Toyota's legendary inline engine, significant modifications had to be made to fit both the engine and the two turbos. The shop doesn't give specifics, but off the images alone we see tons of huge changes.

First, there are the custom engine mounts to move the engine further back against the firewall, which likely also had to be modified. Given the W12's bulk, we imagine the front clip needed some massaging to fit the turbos, which sit just ahead of that red powdercoated intake manifold.

The result is a hilarious amount of torque moving a car that has no right to a motor like that. GPG says that the new W12 engine produces 610 hp and 693 lb-ft of torque. The car itself weighs only 3,547 lbs, a far cry less than the quick Bentayga SUV you'd normally find this engine in.

For GPG, this new powerplant was a huge step up from the car's previous 2JZ configuration. That setup made "just" 518 hp and 496 lb-ft. Inside, the car has a hydraulic handbrake and 5-point harnesses, and given the power levels, we're hoping only one of those parts is needed.

Shortly before applying to law school, Chase decided to take a chance on pursuing his dream job: playing with cars and getting paid for it. Law school was just a means to an end, after all. His first writing job was freelance and barely paid his grocery bill. It quickly turned into a full-time position, eventually leading Chase to join CarBuzz in 2022. Chase now tests cars, and sits comfortably at the news desk when he's not in the driver's seat. In his spare time, Chase can be heard trying to play guitar, or out enjoying Colorado's natural splendor in his BMW M3.