Skip to product information
1 of 1

Stone Exhaust

Stone Exhaust Eddy Catalytic Downpipe BMW MINI B48 B48E F39 F40 F44 F46 (Inc. X2 20i, 220i, M135ix & M235ix)

Stone Exhaust Eddy Catalytic Downpipe BMW MINI B48 B48E F39 F40 F44 F46 (Inc. X2 20i, 220i, M135ix & M235ix)

Regular price $1,970.30 USD
Regular price $2,074.00 USD Sale price $1,970.30 USD
Sale Sold out
Shipping calculated at checkout.
OPF Option

Meet the latest technology that adheres to the world's increasingly stringent environmental regulations at the same time enhances performance to another level. In comparison to commercially available linear frustums, the "arc fluid twist-flow catalytic technology" adopts an arc-packaging method. The turbine emissions process produces a vortex effect which purifies the exhaust gases while maintaining an equal amount of backpressure. When compared to a variety of horsepower tests and straight downpipes, our patented arc fluid twist-flow catalytic technology can effectively increase horsepower and torque.

 STONE Exhaust's Eddy Catalytic Downpipe utilizes their patented "eddy catalytic technology" which adopts an arc-packaging method. With its unique internal design, the downpipe produces a vortex effect which purifies the exhaust gases while maintaining an equal amount of back pressure. When compared to a variety of horsepower tests and straight downpipes, STONE's eddy catalytic technology can effectively increase horsepower and torque.

Features

  • Patented O2 sensor technology design provides real-time data performance by accurately sensing every rotating displacement.
  • No more delayed in power delivery
  • Using one of the rare noble metal to help efficiently filter out exhaust gas.
  • Computer simulation to obtain the best diameter.
  • Special 3D design to achieve 100% OEM fitment, no modification required.
  • SUS304 Premium Grade Stainless steel.
  • Dual Cross-Welding Technology providing substantial increase durability at the turbo Flange.

  

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 Catless Downpipe found on the B48 & B48E Exhaust Systems. 

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 BMW B58 F20 F21 M140i Cat-Back Valvetronic Exhaust System - ML Performance 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.

     

     

    Stone Exhaust BMW B58 F20 F21 M140i Cat-Back Valvetronic Exhaust System - ML Performance UK

     

    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 BMW B58 F20 F21 M140i Cat-Back Valvetronic Exhaust System - ML Performance UK

     

    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 BMW B58 F20 F21 M140i Cat-Back Valvetronic Exhaust System - ML Performance UK

     


    Art of Welding

    7 Axis CNC Bending Machine | Stone Exhaust USA

     

      Compatibility 

      B48 Engine (A228E)

      BMW 2 Series

      • F45 F46 220i (2014+)

      Mini

      • F55 F56 Mini Cooper S (2015+)
      • MINI F60 Country Man Cooper S (2017+)

       

      B48E Engine (A228EG)

      BMW 1 Series

      • F40 M135i xDrive (2018+)

      BMW 2 Series

      • F44 M235i xDrive (2018+)
      • F45 F46 220i (2014+)

      BMW X Series

      • F39 X2 20i/28i (2016+)

      Mini

      • F55 F56 Mini Cooper S (2015+)
      • MINI F60 Country Man Cooper S (2017+)

         

        SKU

        A228E (Non- OPF)

        A228EG (OPF)

         

        Warranty

        Stone Exhaust 2 Year Warranty

         

        Dimension 

        78cm x 25cm x 43cm

         

        Weight

        4.63 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.
        View full details