Kline Innovation Valvetronic Catback Exhaust System for F80 BMW M3

Kline Innovation Valvetronic Catback Exhaust System for F80 BMW M3

The F80 M3, equipped with a 3.0L twin-turbo inline 6-cylinder engine generating anywhere between 425 to 493hp, stands as a deserving heir to the illustrious M3 lineage. Similar to all turbocharged engines, there exists significant potential for enhancing the exhaust sound and power response through exhaust tuning, further elevating its performance capabilities.

The Sound

• By replacing the stock 600cpsi catalysts with high flow HJS cores or racing pipes, the exhaust sound is significantly enhanced, while also dramatically improving turbo spool for increased power and reduced spool time. This is further amplified by the twin 70mm dual oversized downpipes, allowing the engine to unleash its full potential.
• The addition of a 20-degree x pipe to the center section raises the pitch of the exhaust, adding to the exhilarating sonic experience of the inline 6 engine’s scream. To cater to different sound preferences, we also offer the option of a resonated (silenced) or non-resonated center section.
• Working in conjunction with the car’s stock electronic actuated valve system, the rear silencer section transforms into a completely free-flowing path when the valve is open, bypassing the silencer for optimal performance and a more aggressive sound. When the valve is closed, exhaust gases are redirected through a series of chambers and acoustic-filled sections, tuned to enhance low rpm torque and maintain a very quiet volume during cruising speeds.
• The rear section is impeccably finished with a choice of either F1 grade pre-preg Carbon Fiber or Inconel double-walled tails, adding a touch of premium aesthetics and performance.

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.

Carbon Fiber

• Carbon fiber reinforced polymer boasts an incredibly high tensile strength to weight ratio, surpassing that of all metals. Its lightweight nature and remarkable tensile strength make it possible to mold components into nearly any desired shape. The company exclusively utilizes aerospace and Formula 1 grade pre-preg carbon fiber, which undergoes curing in an autoclave at high pressure and temperature. This meticulous process ensures the production of carbon fiber that is not only exceptionally strong but also remarkably lightweight, making it ideal for the most extreme conditions.

Specifications

• Cross Sections:
  • Center Section:
    • 70mm OD Dual
  • Rear Section:
    • 70mm Dual Pipe (valve open)
    • Dual 57mm (valve closed)
  • Selected to achieve a well-balanced combination of rapid turbo spool, torque, and maximum peak power
• Materials:
  • 304 Grade Stainless Steel
  • Inconel 625 Formula One Grade Material

Applications

• BMW M3: F80 (2014-2019) – 3.0L TT I6 S58

Notes

• Inconel tips come as standard

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.