Kies-Motorsports Mastery of Art and Design MAD BMW S58 4" Fat Boy Single Midpipe M2 G87

MAD BMW S58 4" Fat Boy Single Midpipe M2 G87

Name: MAD BMW S58 4" Fat Boy Single Midpipe M2 G87
Brand: Mastery of Art and Design
SKU: MAD-136
Price: 659.0 USD
Availability: InStock

Vendor: Mastery of Art and Design

SKU: MAD-136

Product type: Mid Pipe

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MAD BMW S58 4" Fat Boy Single Midpipe M2 G87

$659.00

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MAD BMW S58 4" Fat Boy Single Midpipe M2 G87

$659.00

Description

Description

BMW G87 M2 4" FATBOY Midpipe – Flow Is Everything

Flow is everything, and the new MAD 4" FATBOY Midpipe delivers exactly that for the BMW G87 M2.

Designed specifically for the S58-powered G87 platform, this midpipe is built to maximize both performance and sound without compromise. Featuring a full-length single 4" center section and maintaining a minimum diameter of 3" throughout, the FATBOY Midpipe ensures optimal exhaust flow and improved throttle response.

The result is a deeper, smoother, and more aggressive tone with noticeably less rasp, even when combined with aftermarket downpipes. Whether you’re chasing performance on the track or looking for a refined yet bold sound on the street, this midpipe brings out the best in your G87 M2.

To make installation seamless, the kit also includes an upgraded brace that provides proper clearance for the larger midpipe.

Key Features:
• Full-length single 4" center section for maximum flow
• Minimum 3" diameter throughout to eliminate restrictions
• Deep, aggressive exhaust tone with reduced rasp
• Compatible with both stock and aftermarket downpipes
• Includes 3" and 2.75" reducer couplers to fit aftermarket or factory axle-back systems
• Uses the factory cut point and clamp system for an easy, reversible install
• Includes upgraded brace for proper clearance and fitment with the larger midpipe

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KIES MOTORSPORTS, LLC — TERMS AND CONDITIONS OF PURCHASE AND SALE Last Updated: April 29, 2026 THESE TERMS AND CONDITIONS CONTAIN VERY IMPORTANT INFORMATION ABOUT YOUR RIGHTS AND OBLIGATIONS, AS WELL AS CONDITIONS, LIMITATIONS, AND EXCLUSIONS THAT MIGHT APPLY TO YOU. PLEASE READ THEM CAREFULLY. THESE TERMS REQUIRE THE USE OF ARBITRATION (ON AN INDIVIDUAL BASIS ONLY) TO RESOLVE DISPUTES, RATHER THAN JURY TRIALS. BY PLACING AN ORDER FOR PRODUCTS OR SERVICES FROM OUR WEBSITE, YOU AFFIRM THAT YOU ARE OF LEGAL AGE TO ENTER INTO THIS AGREEMENT, AND YOU ACCEPT AND ARE BOUND BY THESE TERMS AND CONDITIONS. YOU MAY NOT ORDER OR OBTAIN PRODUCTS OR SERVICES FROM OUR WEBSITE IF YOU (i) DO NOT AGREE TO THESE TERMS, (ii) ARE NOT OF LEGAL AGE TO FORM A BINDING CONTRACT, OR (iii) ARE PROHIBITED FROM ACCESSING OR USING THIS WEBSITE OR ANY OF THIS WEBSITE'S CONTENT, PRODUCTS, OR SERVICES BY APPLICABLE LAW. CERTAIN SERVICES, INCLUDING WITHOUT LIMITATION DME/ECU UNLOCK SERVICES, BENCH UNLOCK SERVICES, TUNING SERVICES, AND DYNO SERVICES, ARE FURTHER RESTRICTED TO PURCHASERS WHO ARE AT LEAST EIGHTEEN (18) YEARS OF AGE AND WHO ARE THE LEGAL OWNER OF THE VEHICLE OR AN AUTHORIZED AGENT OF THE OWNER. ORDERS PLACED IN VIOLATION OF THIS RESTRICTION MAY BE CANCELLED AT THE COMPANY'S SOLE DISCRETION WITHOUT PRIOR NOTICE. These terms and conditions (these "Terms") apply to the purchase and sale of products and services from KIES MOTORSPORTS, LLC (the "Company") through Kies Motorsports (the "Site"). These Terms are subject to change by the Company (referred to as "us", "we", or "our" as the context may require) without prior written notice at any time, in our sole discretion. Any changes to these Terms will be in effect as of the "Last Updated" date referenced above or on the Site. You should review these Terms prior to purchasing any product or services that are available through the Site. 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ALL PRODUCTS AND SERVICES OFFERED ON THIS SITE ARE PROVIDED "AS IS" WITHOUT ANY WARRANTY WHATSOEVER, INCLUDING, WITHOUT LIMITATION, ANY (A) WARRANTY OF MERCHANTABILITY; (B) WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE; OR (C) WARRANTY AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF A THIRD PARTY; WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF PERFORMANCE, USAGE OF TRADE, OR OTHERWISE. SOME JURISDICTIONS LIMIT OR DO NOT ALLOW THE DISCLAIMER OF IMPLIED OR OTHER WARRANTIES, SO THE ABOVE DISCLAIMER MAY NOT APPLY TO YOU. YOU AFFIRM THAT WE SHALL NOT BE LIABLE, UNDER ANY CIRCUMSTANCES, FOR ANY BREACH OF WARRANTY CLAIMS OR FOR ANY DAMAGES ARISING OUT OF THE MANUFACTURER'S FAILURE TO HONOR ITS WARRANTY OBLIGATIONS TO YOU. 6. Compliance With Laws. 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(b) Pre-Existing Condition of the DME. The Company performs Unlock Services on the DME in the condition received. The Company does not, and cannot, audit, validate, or repair the existing software, calibration, or hardware integrity of a DME prior to performing an Unlock Service. If a DME has been previously flashed, partially flashed, interrupted during a flash, corrupted, modified, tampered with, water-damaged, electrically damaged, or otherwise compromised before being sent to the Company, the Unlock Service may still complete successfully on the bootloader while the underlying calibration or operating files remain corrupted or non-functional. THE COMPANY IS NOT RESPONSIBLE FOR THE CONDITION OR FUNCTIONALITY OF A DME THAT WAS ALREADY DAMAGED, FLASHED, BRICKED, OR CORRUPTED BEFORE THE UNLOCK SERVICE WAS PERFORMED. We have the right to refuse service to any DME that has obvious signs of being modified or compromised. (c) Removal, Shipping, and Reinstallation. 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The arbitrator will have exclusive authority to resolve any dispute relating to arbitrability and/or enforceability of this arbitration provision, including any unconscionability challenge or any other challenge that the arbitration provision or the agreement is void, voidable, or otherwise invalid. The arbitrator will be empowered to grant whatever relief would be available in court under law or in equity. Any award of the arbitrator(s) will be final and binding on each of the parties, and may be entered as a judgment in any court of competent jurisdiction. You may elect to pursue your claim in small-claims court rather than arbitration if you provide us with written notice of your intention to do so within sixty (60) days of your purchase. The arbitration or small-claims court proceeding will be limited solely to your individual dispute or controversy. You agree to an arbitration on an individual basis. In any dispute, NEITHER YOU NOR THE COMPANY WILL BE ENTITLED TO JOIN OR CONSOLIDATE CLAIMS BY OR AGAINST OTHER CUSTOMERS IN COURT OR IN ARBITRATION OR OTHERWISE PARTICIPATE IN ANY CLAIM AS A CLASS REPRESENTATIVE, CLASS MEMBER, OR IN A PRIVATE ATTORNEY GENERAL CAPACITY. The arbitral tribunal may not consolidate more than one person's claims, and may not otherwise preside over any form of a representative or class proceeding. The arbitral tribunal has no power to consider the enforceability of this class arbitration waiver and any challenge to the class arbitration waiver may only be raised in a court of competent jurisdiction. If any provision of this arbitration agreement is found unenforceable, the unenforceable provision will be severed, and the remaining arbitration terms will be enforced. 16. Assignment. You will not assign any of your rights or delegate any of your obligations under these Terms without our prior written consent. Any purported assignment or delegation in violation of this Section 16 is null and void. No assignment or delegation relieves you of any of your obligations under these Terms. 17. No Waivers. The failure by us to enforce any right or provision of these Terms will not constitute a waiver of future enforcement of that right or provision. The waiver of any right or provision will be effective only if in writing and signed by a duly authorized representative of the Company. 18. No Third-Party Beneficiaries. These Terms do not and are not intended to confer any rights or remedies upon any person or entity other than you. 19. Notices. (a) To You. We may provide any notice to you under these Terms by: (i) sending a message to the email address you provide; or (ii) by posting to the Site. Notices sent by email will be effective when we send the email and notices we provide by posting will be effective upon posting. It is your responsibility to keep your email address current. (b) To Us. To give us notice under these Terms, you must contact us by either (i) using the "Contact Us" form provided at the Site, or (ii) contacting us by email at info@kiesmotorsports.com. We may update the method for notices to us by posting a notice on the Site. Notices provided by electronic transmission will be effective one business day after they are sent. 20. Severability. If any provision of these Terms is invalid, illegal, void or unenforceable, then that provision will be deemed severed from these Terms and will not affect the validity or enforceability of the remaining provisions of these Terms. 21. Entire Agreement. These Terms, together with any order confirmation or invoice we issue to you, will be deemed the final and integrated agreement between you and us on the matters contained in these Terms.

TERMS (REQUIRED)

OFF-ROAD USE POLICY & EMISSIONS COMPLIANCE NOTICE

California Proposition 65 Warning:

This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.

EPA / CARB Compliance & Legal Use:

Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.

Civil penalties up to $4,819 per violation per vehicle
Possible criminal penalties under the Clean Air Act
Revocation of registration or smog certification by DMV or local authorities

State & Local Regulations:

Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.

Intended Use & Customer Certification:

All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.

I have read and understood the California Proposition 65 Warning. I have read and understood the EPA/CARB Compliance Notice. I understand these products are intended for off-road or competition use only. I acknowledge that it is my responsibility to comply with all federal, state, and local emissions laws. I understand that installation or use on a public road vehicle is a violation of the Clean Air Act and may subject me to personal liability.

Company Policy Statement

Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.

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TERMS (REQUIRED)

California Proposition 65 Warning:

EPA / CARB Compliance & Legal Use:

State & Local Regulations:

Intended Use & Customer Certification:

Company Policy Statement