Porsche Cayman GT4 Gets Tuned To 488 WHP, Remains Naturally Aspirated

Porsche’s already working on the new 718 Cayman GT4, which will reportedly use the 911 GT3’s naturally aspirated flat-six, albeit in a slightly de-tuned form.

However, if you’re the proud owner of the outgoing model, whether the “normal” or the Clubsport version, and you would like to squeeze more power without turning to supercharging or turbocharging, then you might want to consider taking a look at DeMan Motorsport.

Based in New York, the shop is offering a few upgrades for the Cayman GT4 and Cayman GT4 Clubsport, which include an increased engine capacity from 3.8 to 4.25 liters.

The flat-six also gets a new crankshaft, custom pistons, stronger connecting rods and an ECU-tune, which have lifted the output to 488 hp (495 PS / 364 kW) and 360 lb-ft (488 Nm), according to RoadAndTrack – and those numbers have been measured at the wheels.

Also Watch: Pro Racing Driver Shows Cayman GT4 Owner What His Car Can Do On The ‘Ring

At the crank, it’s believed to put out 176 hp (179 PS / 131 kW) and 105 lb-ft (142 Nm) of torque more than the stock engine. Also, with those upgrades, the redline has increased to 8,000 rpm, and can be upped by an additional 500 rpm with titanium internals.

There’s a catch though, as the engine upgrade doesn’t come cheap. It costs $28,500, and that’s without the free-flowing exhaust and Cobb access port, which are mandatory to extract the aforementioned output.

Despite the steep price, DeMan says that Cayman GT4 owners have already updated other aspects of their rides, so the cost shouldn’t be a big problem.

This isn’t DeMan’s first upgrade for the Cayman GT4, as they used to offer a 4.0-liter kit, but these new offerings are superior in every aspect.


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  • Dude

    A near 500hp NA flat six sounds amazing but the actual exhaust note in that video did not imo

  • CC

    I’m skeptical about the power output. If it’s true, then that’s darned impressive and (in the Porsche world) the price is reasonable.

    • Munchma Quchi

      I’m skeptical that the colored baby is yours.

      • CC

        You know, when the foster care folks called to ask if we were willing to adopt an African American child, I completely forgot to check with every stupid son of a bitch on the internet to first make sure they were okay with it. Please accept my most sincere apologies for this oversight.

        • Munchma Quchi

          You’re g’dam right. The stupid SOB should be ashamed of himself. Send me his address and I’ll go punch him in the nuts.

          • CC

            Lucky fella. It’s not every day that a fifty-something, mountain climbing photographer with an FN Five Seven shows up to do stuff to your nuts.

      • willhaven

        The hell is wrong with you?

      • disqus_i7Pv0Rx9YT 3+

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