$595.00 USD
$595.00 USD








Upgrade your BMW S58 engine to the next level with the MAD BMW S58 Catted Downpipes. Designed for performance enthusiasts, these high flow downpipes are engineered to maximize airflow, unleash power gains, and deliver an exhilarating exhaust note.
By replacing the restrictive stock catalytic converters, the MAD S58 downpipes effectively eliminate backpressure, allowing your turbos to spool faster and achieve their full potential. The result? A significant increase in horsepower, with up to 30HP gains on tuned BMW S58 engines equipped with stock turbos. If you've upgraded your turbos, prepare for an even greater power boost.
But it's not just about performance. These downpipes are meticulously crafted with smooth bends to ensure maximum airflow without any annoying drone. They feature 200 CEL Euro5 Cats, providing a perfect balance between emissions compliance and performance enhancement.
To enhance durability and minimize unwanted stress and vibration, the MAD S58 Catted Downpipes come with a flex section. This innovative addition helps absorb and reduce any exhaust system movement, ensuring a seamless driving experience.
Rest assured, quality is our priority. We offer a lifetime warranty against defects and fitment issues, giving you peace of mind with your purchase. Additionally, we provide a 90-day return period, allowing you to experience the benefits of our downpipes firsthand.
When you choose MAD, you're choosing convenience. We strive for quick order processing, with all orders shipping within 1-2 business days. Plus, our downpipes are engineered for spot-on fitment, ensuring a hassle-free installation process.
Unlock the true potential of your BMW M3, M4 G80, G82, or G83 with the MAD BMW S58 Catted Downpipes. Experience the thrill of increased power, enhanced sound, and optimized airflow. Upgrade today and elevate your driving experience to new heights!
Fitment:
2021+ BMW M3 G80
2021+ BMW M4 G82 G83
2023+ BMW M2 G87
SKU:
MAD-051
Disclaimer:
For race use only. This product is not certified for use on public roads and may not comply with local emissions regulations. Additionally, it does not prevent the illumination of the Check Engine Light (CEL). Please consult your local laws and regulations before installation.
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$595.00 USD
$595.00 USD
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.
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.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
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.
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.