SKU: 2030904603

MAD BMW S58 Catted Downpipes M3 M4 G80 G82 G83 W/ No CEL Guarantee & Flex Section

Sale price$944.37 Regular price$1049.30
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Oct 31 - Nov 5

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For Your Every Summer RSVP, with Code: SUMMER15

Description

MAD BMW S58 Catted Downpipes M3 M4 G80 G82 G83 W/ No CEL Guarantee & Flex SectionIntroducing the MAD S58 Catted Downpipe The perfect upgrade for BMW enthusiasts looking to unlock more performance and a deeper, more aggressive exhaust note without triggering a check engine light. Crafted from high quality 304 stainless steel, this downpipe is built to handle extreme heat and harsh driving conditions. The smooth piping transitions are designed for maximum exhaust flow, delivering noticeable gains in horsepower, torque, and throttle

Introducing the MAD S58 Catted Downpipe

The perfect upgrade for BMW enthusiasts looking to unlock more performance and a deeper, more aggressive exhaust note without triggering a check engine light. Crafted from high-quality 304 stainless steel, this downpipe is built to handle extreme heat and harsh driving conditions. The smooth piping transitions are designed for maximum exhaust flow, delivering noticeable gains in horsepower, torque, and throttle response. Equipped with 300 cell high-flow catalytic converters, the MAD S58 Catted Downpipe improves engine sound and overall drivability while keeping the check engine light off. It bolts directly to the factory exhaust system with no cutting or welding required, making installation quick and hassle-free. It’s also fully compatible with most aftermarket exhaust systems, giving you the freedom to customize your build.

No CEL guarantee

If you get a check engine light related to the catalytic converter, MAD will replace the downpipe for free. Don’t settle for stock performance. Upgrade to the MAD S58 300 Cell Race Catted Downpipes and experience the full potential of your BMW. Race use only

Features

  • 300 CEL catalytic converters
  • No check engine light guarantee
  • Compatible with right-hand drive and left-hand drive vehicles
  • Smooth bends for maximum airflow without drone
  • Up to 30HP increase on stock turbos, even more with upgraded setups
  • Lifetime warranty on defects and fitment
  • 90-day return period
  • Ships in 1 to 2 business days
  • Spot-on fitment
  • Flex section for added durability

Fitment

  • 2021 and up BMW M3 G80
  • 2021 and up BMW M4 G82 and G83
  • 2023 and up BMW M2 G87

Disclaimer

For race use only. This product is not certified for use on public roads and may not comply with local regulations. Always check your local laws before installing.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 2030904603

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Karin Walford
Massapequa, US
★★★★★ 5
Beautiful Large Purse
Color: Light Brown
5 STARS !! Love this purse. I have had expensive name brands and this I has been my favorite. Love the size, the hardware, the long strap, stong handles, the feet on the bottom the color is beautiful. Great quality so far 6 months. Even got sprinkled on in the rain dried no spots. The large is large so if you like large bags it is it. I have always wanted a I guess you would call it a medical bag. As you can tell from this I really love the bag
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Reviewed in the United States on April 10, 2026
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Cal
Louisville, US
★★★★★ 5
Great choice
Color: Light Brown
I probably lost a good 40 bags in a house fire and am just now able to begin to replace them. I made a good choice starting with Iswee! The quality and craftsmanship is top notch! Easy to get into and find items right away! The leather is soft and sturdy and the color is great! I would have rather the hardware be done in an antique finish rather than a shiny silver but it’s okay. I’m going to enjoy carrying this bag! Thank you
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Reviewed in the United States on May 17, 2026
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Bobbette Jamison Smith
Bozeman, US
★★★★★ 5
YOU MUST BUY!!
Color: Green, Color: Green
Hello, This is the first ever review that I’ve ever written. I couldn’t wait for this bag to arrive, and it came today as scheduled. It IS THE MOST - ABSOLUTELY BEAUTIFUL - as soon as I opened the packaging I could smell the leather! - the “colour” lol is RICH! I am a GREEN everything person, and this green is STUNNING! The QUALITY is great and appears to be VERY DURABLE. The inside is EXTREMELY roomy and deep, which is good for me because I’m lazy about zipping my purse up. BUT the zipper glides with ease. It’s a medium weight purse, so be aware of what you’re putting in there lol Value wise, it’s definitely worth the money and it looks MUCH MORE EXPENSIVE than it actually costs! I took the strap through and made it a shoulder strap also. I WILL definitely be buying the burgundy one next! Thank You ISWEE BOBBETTE
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Reviewed in the United States on January 4, 2026
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K H
Lake Worth, US
★★★★★ 5
Great Tote Bag
Color: Navy Blue
This a really nice bag! I can't wait to go on my trip. It is just the right size, not too big, not too small. It holds a lot of things and I can reach in and see all of it. I like that it has the shoulder strap that you can either keep on or take off. The leather is so soft and looks beautiful. Seems to be really well made and I will have it for a long time and plan on using it every time we travel.
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Reviewed in the United States on February 25, 2026
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Fre Dreamsky
Houston, US
★★★★★ 5
Beautifully Constructed & Thoughtful Design
Color: Coffee
Perfect size! And I love the adjustable handles! I only wish it came in black as well. But I love love LOVE the quality of this bag!
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Reviewed in the United States on May 8, 2026

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