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Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA
Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA

Stone Exhaust AUDI EA888 B9 Cat-Back Valvetronic Exhaust System (A4 40 TFSI & A5 40 TFSI)

Regular price
$3,972.00
Regular price
$3,972.00
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We are proud to introduce you to the state of the art Stone Exhaust Valvetronic Cat-Back Exhaust System, to enhance the performance and sound of your AUDI B9 A4 40 TFSI / B9 A5 40 TFSI with the EA888 engine.

Stone Exhaust has been developing world's best exhaust system since 1998, starting with 3D scanning and reverse engineering the OEM system, this allows the Stone engineers to design a 100% OEM fitment exhaust with precision. With our in-house dyno, your ADUI exhaust system is proven to produce more power with the enhanced Stone signature exhaust sound.

The Cat-Back Valvetronic System comes with a separate remote controller that gives you full control of the exhaust, allowing you to open and close the valves with a click of a button. You can also set it in auto mode for the valves to open at a certain rpm automatically. The Stone Valvetronic system is a plug and play system, and connects to your OBDII port, which can be installed within a few minutes.

 

Stone Valvetronic System Installation 

  

Features

  • Valvetronic System
  • One Piece Design
  • Mechanical Welding with Precision
  • In House Research and Development
  • 3D Scanning & Reverse Engineering
  • Remote Control with On / Off / Auto settings
  • Dyno Developed In House
  • Reduces Drone

       

      A4 B9 40 TFSI Avant Stone Exhaust Eddy Catalytic DP + Remote Control Valvetronic system in Catback Sound


        

      Fitted Photo(s) - Dual Exit Twin Tailpipes

      Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA

       

      Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA

       

      Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA


      Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA

       

      Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA

       

      Stone Exhaust AUDI EA888 B9 A4 A5 40 TFSI Vavletronic Catback Exhaust System | Stone Exhaust USA

       

      R&D and 3D Scanning

      Stone Exhaust engineers use reverse engineering by 3D scanning OEM parts to understand their functionality and identify weaknesses. Data has been collected continuously in order to analyze factors such as pipe diameter, route and degrees of the bending angles of the EA888 Exhaust System found on the AUDI A4 40 TFSI & A5 40 TFSI. 

      During R&D, Stone Exhaust utilizes the 3D simulation software to stimulate the exhaust gas flow movement, thermal and pressure rise zone. Progressive improvements were continually made until the optimal performance was achieved.

      Stone Exhaust System 3D Scanning Reverse Engineering UK

       

       

      7 Axis CNC Bending Machine

      Stone Exhaust System are constructed utilizing a 7 axis CNC Bending Machine which is the ultimate machine for high levels of precision delivery, necessary for industries such as the aerospace and defense industries.

        With the state-of-the-art bending machine, Stone Exhaust has achieved the industry’s standard to an impressive 98% roundness, whilst maintaining the wear of the outer bore at only 25% at 180°. Airflow obstruction and welding fracture problems are prevented by utilizing this technology. With the combination of the CNC Bending machine, Reverse Engineering and 3D Design Scanning, Stone exhaust has created an integrally molded exhaust pipe with an accuracy error under 0.025mm. 

        7 Axis CNC Bending Machine | Stone Exhaust USA

         

        Crisscross and Overlapping Welding Technique

        The flange between the turbo and the downpipes reaches extreme temperatures (800℃ to 1100℃) which creates stress on the connection point. By utilizing both welding techniques to increases the width and penetration of welds. This increases the endurance and tolerance of these connection points, leading to quality products with reliable performance.

        Stone Exhaust Art of Welding - Stone Exhaust USA

         

        Direct Spot Welding

        Our highly skilled engineers perform direct spot welding to increase product strength. This is undertaken by mechanical welding arms, proven to achieve greater precision and penetration in their welds compared to manual welding, resulting in an end product that is a work of art. 

        Stone Exhaust Art of Welding - Stone Exhaust USA

         

        Compatibility- EA888 Engine

        AUDI B9

        • A4 40 TFSI (2017+)
        • A5 40 TFSI (2016+)


        SKU

        RP501S40

         

        Warranty

        Stone Exhaust One Year Warranty

         

        Dimension 

        110cm x 33cm x 60cm 

         

        Weight

        17.23 kg 

         

        Emission Notice 

        Various U.S. states and the U.S. federal government have individual laws regulating the use of aftermarket exhaust parts and system, especially when the stock system is modified, remove, or if you are replacing original catalysts. Please consult the appropriate law department in your area before installing any aftermarket part or system on your vehicle to ensure compliance with all applicable laws. The purchasers are entirely responsible for informing themselves of the applicable laws where the products are to be used and to comply with those laws.


        If you are residing in Europe, Stone’s cat-back exhausts are OPF-compatible, which means you won’t need to code out the OPF or worry about losing your warranty.