Kline Innovation Valvetronic Exhaust System for Audi RSQ8 & SQ8

Kline Innovation Valvetronic Exhaust System for Audi RSQ8 & SQ8

The Audi RSQ8 stands as a potent and capable utility vehicle. However, its sound was deemed somewhat reserved, failing to fully embody the true character and strength of this formidable machine.

The Sound

• By replacing the factory catalysts, which tend to be restrictive, with either 100 or 200 cell HJS HDPE motorsport catalysts, the exhaust sound is significantly enhanced. Additionally, the incorporation of a 20-degree x pipe helps blend the gases out of phase, resulting in a raised pitch for the exhaust note and the reduction of undesirable drone.
• In the rear section, the exhaust system utilizes the car’s stock electronic valve control system. When the valve is closed, the exhaust gases are redirected through a series of chambers and acoustic fill sections, resulting in a smooth and quiet ride during cruising. However, when the valve is open, the silencer is completely bypassed, allowing for an unobstructed and commanding roar that befits the powerful nature of this vehicle.

Performance

• Through the performance-oriented removal of restrictions from the silencer section and the installation of a completely unrestricted free-flow system when the valve is open, the exhaust achieves optimal efficiency, resulting in noticeable power and torque improvements.
• The introduction of racing pipes brings significant gains, with an impressive increase of 37 horsepower and 48 Nm of torque.

Stainless Steel

• In the realm of exhaust manufacturing, the prevailing industry standard revolves around the utilization of 304-grade stainless steel. This particular grade of stainless steel offers a well-balanced combination of moderate strength, thermochemical stability, cost-effectiveness, and ease of production. It enables the construction of exhaust systems that strike a reasonable balance between affordability and functionality, ensuring long-lasting durability. However, it is worth noting that stainless steel is relatively heavier when compared to alternative materials. While it shares a similar density with regular steel, it possesses slightly lower tensile strength. This limitation hinders the potential for creating high-performance exhaust components using stainless steel. Additionally, in terms of sound characteristics, the thicker sidewalls required by stainless steel may result in a somewhat less vibrant and dynamic exhaust note compared to the aforementioned materials.

Inconel

• When it comes to ensuring durability and heat resistance in the aerospace industry, the utilization of Inconel 625 is of utmost importance. This extraordinary material finds extensive applications in the manufacturing of critical components, particularly exhaust turbine blades for high-performance jet engines. Notably, Inconel is the preferred choice for Formula One exhaust systems and has been selected by manufacturers involved in prestigious hypercar projects like the McLaren P1 and Aston Martin 177. These applications greatly benefit from Inconel’s exceptional ability to withstand extreme temperatures exceeding 1000°C while prioritizing lightweight design.
• Inconel exhibits extraordinary properties, including remarkably high tensile strength and outstanding thermochemical stability. Its tensile strength is comparable to that of titanium, resulting in an exceptional strength-to-weight ratio. Consequently, Inconel allows for the use of thin sidewall materials while preserving structural integrity, enabling the production of lightweight components that demonstrate resistance to fatigue over prolonged periods. However, working with Inconel presents certain challenges due to its difficult machinability and specific welding requirements, demanding specialized skills and time-consuming techniques. Additionally, the unique properties and specialized manufacturing processes associated with Inconel contribute to its higher cost as a raw material.

Catalyst

• To achieve the optimal balance between torque and increased power, all cross sections have been enlarged by approximately 10% compared to the stock dimensions.

Materials

• The Kline Innovation exhaust system offers two material options: 304 Stainless Steel or the exceptionally lightweight F1 Grade Inconel 625.

Specifications

• Silencer Section: 70mm
• Valve Closure Transit: 57mm
• Valve Open Transit: 70mm
• 20 Degree X-Pipe

Applications

• Audi RSQ8: (2019+) – 4.0L TT V8
• Audi SQ8: (2019+) – 4.0L TT V8

Notes

• Although the images prominently feature the catted downpipes, it is important to emphasize that they are not included in 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, mould 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.