The Porsche 718 Cayman is set to disappear soon as Porsche advances its electrification plans.

While some form of tribute to the most accessible Porsche is expected, an owner in Florida, USA, has decided to do so in the most unconventional way possible. They have achieved an astonishing modification by installing the Porsche 911 GT2 RS engine into a 2016 Cayman 981 GTS.

 

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Ambitious but Not Impossible Engine Swap

This engine swap was realized by BGB Motorsports Group in the Sunshine State (Florida).

It combines a 2016 Cayman GTS with a 3.8-liter 991.2 911 GT2 RS flat-six engine that had less than 5,000 miles on it at the time of installation. Their mission was to create perhaps the most powerful Cayman ever using only genuine Porsche parts.

They reportedly achieved this almost perfectly, though non-Porsche parts were necessary for connections and piping to rearrange components. Aside from that, the setup was near flawless, with the biggest challenge being the water cooling system.

Since the car is intended for use in hot climates like Florida, with help from a builder named JT Oliver, they completed a system that circulates water between a rear-mounted intercooler and a tank located in the front trunk (frunk).

 

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Astounding Power and Performance

Regarding output, the Cayman fitted with the GT2 RS engine reportedly produced 650 horsepower at the time of the dyno test.

However, this is a conservative figure, and according to their claims, it can be pushed up to 800 horsepower. The owner explains that they are focusing on optimizing traction before increasing power. What’s truly impressive is that all of this was achieved using the stock ECU, PDK calibration, ABS, and Porsche Stability Management (PSM).

Visually, upgrades have been made to match the incredible modifications at the rear. The Cayman GTS was upgraded using parts from the Cayman GT4 sourced from Porsche dealers. Damping and brakes were reinforced with parts from the GT4S Clubsport, and the wheels were upgraded to lightweight 18-pound Forgeline GA1R wheels.

Commitment to Genuine Porsche Parts

What stands out about this project is the use of almost exclusively genuine Porsche (OEM) parts. The builders only used non-Porsche parts when necessary for relocating or connecting factory components. This approach allowed them to maintain high reliability and quality while achieving astonishing performance.

The water cooling system was meticulously designed, especially considering use in hot environments like Florida. Their unique system circulates water between the rear-mounted intercooler and a tank installed in the front trunk, ensuring proper engine cooling.

 

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The Ultimate Cayman Available Now

This engine-swapped Cayman GT4 is currently undergoing endurance testing from spring through summer.

This is to ensure the water cooling system functions as intended, and surprisingly, this car is currently available for purchase. Interested parties can inquire, though the exact price has not been disclosed (it’s certainly not cheap).

This project has attracted attention from many Porsche enthusiasts as an example of pushing the Porsche Cayman’s potential to the limit. While the standard Cayman already offers excellent performance, fitting it with the 911 GT2 RS engine transforms it into a car that delivers a completely new level of driving experience.

As Porsche steers toward electrification, projects like this that pursue the ultimate in internal combustion engine appeal express deep respect and passion for traditional engine technology. While the GT3 engine and Cayman combo was realized in the GT4 RS, the pairing of the Cayman with the powerful flat-six from the 911 GT2 RS is an ultimate combination that many Porsche owners dream of but few can achieve.