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Buy This Porsche Cayman GT4 With a 4.5-Liter DeMan Engine and Embarrass Supercars at the Track

If you've got $200,000 and some driving skills, this might be the best bang-for-the-buck hardcore sports car you can buy right now.

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A silver 2020 Porsche Cayman GT4 is parked on a very nice driveway
The Cayman GT4 is already pretty cool, but there’s a monster lurking somewhere in the middle of this car.
Photo: SLATETT via Rennlist

Matt Farah – noted cat enthusiast and host of The Smoking Tire – recently took delivery of a seriously bananas Porsche Boxster Spyder. Now, a Boxster Spyder is already pretty cool, being the most hardcore version of Porsche’s mid-engine drop-top that you can get, but Matt went ahead and did something most of us would never imagine: He had a shop rip out the zero-mile motor and rebuild it into a monster.

That engine is known as the DeMan 4.5, and while it starts with Porsche’s already-great 4.0-liter naturally aspirated flat-six, the end result would make a GT3 soil itself in fear. That’s because the DeMan 4.5 is good for a whopping 565 hp and, more importantly, 439 lb-ft of torque. And while it’s pretty doubtful that Matt will sell you his Boxster, I’m happy to say that if you’ve got the cashish, there’s another way.

McLaren Artura in-depth; Boxster Spyder road trip; ADM; Q&A - TST Podcast #786

Enter this For Sale ad on the noted Porsche enthusiast forum Rennlist for a 2020 Cayman GT4 with the same drivetrain setup as Matt’s car. Being a GT4, it’s even more desirable to hardcore track rats thanks to its GT3-derived suspension and the added rigidity of a fixed roof. The catch is that if you want it, you’ll have to fork over around $200,000 or around twice the going rate for a standard, low-mileage GT4.


The owner of this GT4 says the car was converted by DeMan in February of 2022 and, with a 98-octane tune and catted headers, is good for around 545 hp. The car comes with a few extras, notably several cases of octane booster which means that you can run this thing on the street on pump gas, and a few aftermarket bits that should improve your quality of life, such as a full Xpel clear bra and ceramic coating.

Is this the raddest hardcore sports car you can buy right now for around $200,000? Yes. It would likely embarrass the hell out of most exotic cars at your local track days. As evidence of this, the owner included in-car footage of himself at Virginia International Raceway turning in a 2 minute, 17 seconds lap per his own data logger, which isn’t unimpressive, especially not accounting for driver skill. I’d suspect that with a real hot shoe in the car, this would easily do under two minutes.


So, if you’ve got deep pockets and are ready to out-Farah the Smoking Tire host himself, go make a Rennlist account and cut a big check.

May 2022 VIR