Porsche Cayman GT4 Upgraded With GT3 RS Flat-Six Engine CarBuzz News Features New Cars Used Cars Sell My Car Shopping Tools Car Reviews Car Finder Compare Cars Best Cars Car Dealerships Used Car Reviews Car Advice Home News Porsche Cayman GT4 Upgraded With GT3 RS Flat-Six Engine

Porsche Cayman GT4 Upgraded With GT3 RS Flat-Six Engine

Dec. 23, 2018 8:20 AM ET by Jared Rosenholtz Tuning / 1 Comment Track-focused Cayman now comes with almost 500 horsepower. For the past several months, we've seen countless spy shots of the rumored Porsche 718 GT4 testing. Unlike the original GT4, which was powered by a 3.8-liter flat-six from a 911 Carrera S, this new car is expected to use a detuned 4.0-liter flat-six from the current GT3 that produces 500 horsepower. If you just can't wait for Porsche to reveal the new 718 GT4, a tuner called DeMan Motorsports has you covered with a flat-six engine upgrade. Instead of going down the easy route by adding a turbo or supercharger, DeMan has bored out the 3.8-liter flat-six to 4.25-liters. DeMan previously offered a 4.0-liter upgrade but says this new 4.25-liter job is even more focused on delivering peak power. The stock engine delivers 385 hp, though Deman says its new upgrade will produce 488 hp and 360 lb-ft of torque at the wheels. Factoring in a 15% drivetrain loss, this monster now produces 561 hp and 414 lb-ft at the crank - an increase of 176 hp and 105 lb-ft of torque over stock. This 4.25-liter GT4 is even more powerful than the current 911 GT3 RS. DeMan has even posted a dyno video showing the car hitting its increased 8,000 rpm redline. According to Road & Track, optional titanium internals can further increase the redline to an eye-watering 8,500 rpm. So what's the cost for this incredible upgrade? $28,500, plus the cost of a Cobb access port. DeMan says most of the customers interested in this sort of power increase have already performed other upgrades to their car, allowing the base price to remain fairly reasonable. Even when Porsche does reveal the 718 GT4, we know it won't be as impressive as this.

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Porsche 718 Cayman Jared Rosenholtz Editor-at-Large After graduating with an MBA, Jared pursued his love of cars by becoming an automotive journalist. An internship with CarBuzz grew into his current position as Editor At Large. Jared now spends most of his time evaluating new vehicles and chasing the latest news stories in the automotive industry. When he’s not attending Cars & Coffee events on the weekend, Jared loves to watch NFL football and cruise around with the top down in his German convertible. Contact Jared @Carsnbites @jar_rosenholtz LoginSign Up Home News Features Car Reviews Car Advice 2021 CarBuzz Awards New Cars Used Cars Future Cars Compare Cars Sell My Car Car Dealerships Buy Here Pay Here Used Car Reviews Popular Tags Cars # Video # TOP # Spy Shots # Reveal # Rumor # Auto Show # Supercar # Tuning # Car Culture # Industry News # Motorsport Acura Alfa Romeo Aston Martin Audi Bentley BMW Bollinger Bugatti Buick Cadillac Caterham Chevrolet Chrysler Dodge Ferrari Fiat Fisker Ford Genesis GMC Hennessey Honda Hyundai Infiniti Jaguar Jeep Karma Kia Koenigsegg Lamborghini Land Rover Lexus Lincoln Lordstown Lotus Lucid Motors Maserati Mazda McLaren Mercedes-Benz Mini Mitsubishi Nissan Pagani Polestar Porsche Ram Rimac Rivian Rolls-Royce Spyker Subaru Tesla Toyota Volkswagen Volvo By Make Acura Alfa Romeo Aston Martin Audi Bentley BMW Bollinger Bugatti Buick Cadillac Caterham Chevrolet Chrysler Dodge Ferrari Fiat Fisker Ford Genesis GMC Hennessey Honda Hyundai Infiniti Jaguar Jeep Karma Kia Koenigsegg Lamborghini Land Rover Lexus Lincoln Lordstown Lotus Lucid Motors Maserati Mazda McLaren Mercedes-Benz Mini Mitsubishi Nissan Pagani Polestar Porsche Ram Rimac Rivian Rolls-Royce Spyker Subaru Tesla Toyota Volkswagen Volvo By Car Type SUVs Crossovers Sedans Coupes Trucks Sports Cars Wagons Vans Hatchbacks Convertibles Small Cars Luxury Cars Electric Cars Hybrid Cars Future Cars By Price Up to $15K $15K - $25K $25K - $35K $35K - $45K $45K - $55K $55K - $75K $75K - $100K $100K - $200K $200K - $300K Above $300K Back To Top