Kline Innovation Valvetronic Exhaust System for 991.2 Porsche 911 Carrera & Carrera GTS

Kline Innovation Valvetronic Exhaust System for 991.2 Porsche 911 Carrera & Carrera GTS

The Porsche 991.2 Carrera represents a milestone as the first Carrera model to supplant its naturally aspirated engine with a 3.0L twin turbo. Despite its robust output of 414hp and a noteworthy 0-60 mph acceleration time of 4.1 seconds (in the case of the Carrera S model), the 991.2 Carrera has faced disapproval due to its insufficient exhaust noise, an element that was integral to the personality of previous Carrera models. However, at Kline, the team excels in transforming uninspiring turbo noises into the compelling wails of a supercar. Their primary design objective for the 991.2 Carrera was to reinvigorate its voice and spirit!

About The Sound

• Capitalizing on the established reputation of the Kline Porsche turbo line, many similar defining features have been incorporated into the Carrera turbo series. Among these features are a 1D CLR X pipe for a thrilling high-rpm roar, harmonically tuned mufflers, and ultra-thin Inconel 625 for the unmistakable “Kline” sound. The Kline Carrera Turbo system also features a valvetronic design, facilitating a quiet mode when the valve is closed and an unrestricted, raw scream with optimized performance when the valves are open.
• This system is available in a racing variant for ultimate sound and performance or a choice of 100 or 200 cell high flow sports cats. The cat section is modular, which allows for rapid swapping between the cats and racing pipes, depending on intended use. Performance gains for the racing system stand at 35hp and 41nm @6000 rpm, and 20 and 16hp for 100 and 200 cell respectively.
• Kline headers, manufactured from 0.9mm wall Inconel 625 and featuring a smooth equal length design and an internally laser-welded Inconel collector, result in faster and more efficient turbo spooling. This leads to an increase in torque and power across the rev range, with the most significant rise of 20nm and 15hp at 6000rpm.
• The use of F1 grade Inconel 625 throughout the construction leads to the lightest and most resilient manifolds available on the market, outperforming others by a factor of 2.

Stainless Steel

• Within the exhaust manufacturing industry, the material of choice is often 304-grade stainless steel due to its adequate strength, thermochemical stability, cost-effectiveness, and ease of fabrication. However, stainless steel, despite being suitable for constructing robust exhaust systems, is heavier than alternative materials. While its density is comparable to regular steel, its tensile strength is lacking, limiting its potential for high-performance exhaust components. Also, the requirement for thicker walls with stainless steel may result in a less vibrant and more muted exhaust sound.

Inconel

• Inconel 625 is highly valued in the aerospace industry for its durability and heat resistance. It finds extensive use in manufacturing crucial parts, particularly exhaust turbine blades for high-performance jet engines. Inconel is favored in Formula One exhaust systems and has been selected by manufacturers for distinguished hypercar projects such as the McLaren P1 and Aston Martin 177. Capable of withstanding temperatures beyond 1000°C, Inconel prioritizes lightweight design. Nevertheless, Inconel poses unique challenges due to its difficult machinability and specific welding requirements, necessitating specialized skills and time-consuming techniques.

Carbon Fiber

• Carbon fiber reinforced polymer, possessing a tensile strength-to-weight ratio that exceeds all metals, displays remarkable properties. Its lightweight nature combined with its impressive strength makes it a preferred material in various industries, including automotive and aerospace. Carbon fiber components contribute to weight reduction and offer improved stiffness, enhancing overall vehicle.

Specification

• Cross Sections:
  • Racing Cross Section: 70mm
  • X-Pipe: 63.5mm
  • Headers: 41mm Primaries (chosen for across the graph torque gains)
  • 45mm Valve Closed Transit / 63.5mm Valve Open Transit
  • Catalysts come in a variety of cross sections from 108mm OD to 127mm OD
• Materials:
  • Premium Grade Inconel 625 Superalloy:
    • Full Valvetronic System: 10.5kg
  • 304 Grade Stainless Steel:
    • • Full Valvetronic System: 19kg
• Manifolds:
  • Inconel 625: 1.5kg each
  • Stainless Steel: N/A

Applications

• Porsche 911 Carrera: 991.2 (2015-2019) – 3.0L TT Flat-6
• Porsche 911 Carrera GTS: 991.2 (2017-2019) – 3.0L TT Flat-6

Notes

• It’s important to highlight that the images feature test pipes, manifolds, and carbon fiber tips. However, it’s crucial to clarify that these components are not incorporated within the standard package.

About Kline Innovation

At Kline, exhaust design is approached with utmost seriousness. The company adopts a no-compromise stance when it comes to delivering a product that meets the highest standards and satisfies customers’ expectations. Kline offers a comprehensive original equipment design and manufacturing service. Starting from provided drawings or design briefs, the team utilizes advanced 3D modeling techniques to create final designs. They also provide valuable consultation during the process and are capable of manufacturing tooling and fixtures for production, as well as handling final production runs, particularly catering to low to medium volume needs. Kline’s commitment to excellence ensures that customers receive a top-quality product without any compromises.

Development

• All projects at Kline are executed entirely in-house, utilizing a diverse range of processes. These internal capabilities include laser scanning, CNC laser cutting, CNC mandrel bending, tubing and silencer manufacturing, CNC welding, pressings, CNC milling, mold manufacturing, and autoclave carbon fiber production. Notable automotive clients, such as W Motors with their Fenyr Supersport, Corbellati Missile, and RUF Automobil, have recently collaborated with Kline.
• Kline has expanded its design and manufacturing process by incorporating laser scanning capabilities. This valuable addition enables the team to achieve enhanced precision in both design and quality control, resulting in an exceptional end product for customers. The adoption of laser scanning technology at Kline showcases the company’s unwavering dedication to delivering superior outcomes.