Stone Exhaust BMW S63 F06 F10 F90 Catless Downpipe (Inc. M5 & M6) | Stone Exhaust USA
Stone Exhaust BMW S63 F06 F10 F90 Catless Downpipe (Inc. M5 & M6) | Stone Exhaust USA

Stone Exhaust BMW S63M F06 F10 Catless Downpipe (Inc. M5 & M6)

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In order to get even better efficiency for the section of exhaust turbine, as well as to prevent multiple welding positions in the downpipe section, which generates ash in the pipe while welding, causing bad exhaust efficiency, and then generates vaper lock and thus inability to exhaust, Stone Exhaust uses a variety of smart ideas in downpipe design. The company employs flow velocity measurement software in 3D and the technique of one-piece bend pipes, along with mechanical arms which accurately welds without generating ash in the pipe wall in order to further exhaust efficiency of Catless Downpipe. It is a perfect and effective product which has surpassed all similar products in the market.



  • Catless downpipe for M5 & M6 with S63M engine.
  • Crisscross welding to strengthen turbo flange
  • One Piece Design
  • Machine Welding
  • In House Research and Development
  • 3D Scanning & Reverse Engineering
  • 100% OEM Fitment


Power Gain

+ 18.9Ps 
at 6116rpm
+ 1.57nm of torque 
at 2921rpm


BMW F10 S63M M5 Stone Exhaust 


Fitted Photo(s)

Stone Exhaust BMW S63 F06 F10 F90 Catless Downpipe (Inc. M5 & M6) | Stone Exhaust USA


Stone Exhaust BMW S63 F06 F10 F90 Catless Downpipe (Inc. M5 & M6) | Stone Exhaust USA


Stone Exhaust BMW S63 F06 F10 F90 Catless Downpipe (Inc. M5 & M6) | 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 BMW S63 M5 & M6. 

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 - S63M Engine

    BMW M Series

    • F10 M5 (2010-2016)
    • F06  M6 (2011-2015)
    • F06 LCI M6 (2014-2018)
    • F12 M6 (2011-2015)
    • F12 LCI  M6 (2014-2018)
    • F13 M6 (2011-2015)
    • F13 LCI M6 (2014-2017)





      70cm x 20cm x 18cm



      5.04 kg


      Emission Notice 

      Various U.S. states and the U.S. federal government have individual laws regulating the use of aftermarket exhaust parts and systems, especially as those parts and systems modify, remove, or replace original equipment catalysts. Please consult the appropriate laws 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 law.