The 800-horsepower TechArt GT Street R gives birth to a convertible.

German company Techart is the perfect partner for anyone serious about modifying their Porsche. One example is the latest GT Street R, based on the 992-generation Porsche 911 Turbo (and S), which delivers 800 hp and 700 lb-ft of torque.

The company now offers a convertible version of the GT Street R that packs all the performance of its coupe sibling.

In developing this car, TechArt engineers first began by revamping the powertrain by introducing a new turbocharger, exhaust, and engine management system. The management of the eight-speed dual-clutch transmission was also redesigned to provide power to all four wheels.

The upgrade to Stage 1 raises output to 700 hp and torque to 664 lb-ft. Buyers seeking higher performance can choose the Stage 2 upgrade with 800 hp and 700 lb-ft. These new figures are comparable to the 572 hp and 553 lb-ft of the stock turbo and the 640 hp and 590 lb-ft of the stock Turbo S. With the Stage 2 upgrade, the top speed is 217 mph, 12 mph faster than the Turbo S

. To ensure stability at high speeds, engineers developed a number of carbon fiber aerodynamic modifications. Also not to be overlooked are the widened wheel arches that were added to match the forged wheels offered by Techart. The forged wheels, which have a maximum diameter of 21 inches, can be center-locked or fitted with discs designed to improve aerodynamics. Sports springs and a coilover kit are also available to further improve handling at the limit.

Depending on the customer's wishes, TechArt will also dress up the cabin. Interior options include a mix of Alcantara, carbon fiber, and leather, and customers can even use heritage-inspired materials.

It is safe to assume that those looking to turn their 911 Turbo into a GT Street R are serious performance enthusiasts; there seems to be a group of individuals who enjoy the feeling of wind in their hair at triple digit speeds, and the GT Street R Cabriolet is the perfect solution. Upgrade prices start at 63,000 euros (about $73,500).

Note that production is limited; Techart plans to produce only 87 units in total, including both coupe and convertible body styles. This number commemorates Techart's founding in 1987. An even more radical GT Street RS will likely be created for buyers who missed out.