$595.00 USD
$595.00 USD






Looking to transform the sound of your 2024+ BMW X5M or X6M Competition without worrying about a check engine light? The MAD Catless Secondary Downpipes for the S68 engine are the perfect solution.
Unlike primary downpipes, the secondaries are installed further downstream in the exhaust system. This means you get the same aggressive exhaust tone and volume increase that most enthusiasts want, without interfering with the primary catalytic converters that trigger CEL warnings.
These downpipes are a customer favorite because they dramatically improve the exhaust note, adding a deeper and more aggressive tone that brings your S68 to life. While the power gains aren’t as large as with primaries, you’ll still notice improved throttle response and some extra performance. For many owners, this is the ideal balance of sound and reliability.
Built from high-grade 304 stainless steel with precision TIG welding, the MAD secondary downpipes are designed to handle extreme heat and deliver long-lasting durability. The bolt-on design makes installation straightforward with no cutting or permanent modifications needed.
Aggressive sound upgrade with no check engine light
Noticeable performance increase and sharper throttle feel
304 stainless steel construction for durability
TIG welded and engineered for maximum flow
Direct bolt-on fitment for easy installation
Limited lifetime warranty
2024+ BMW F95 X5M LCI Competition (S68 engine)
2024+ BMW F96 X6M LCI Competition (S68 engine)
Emissions Disclaimer:
This product is not legal for sale or use on pollution-controlled vehicles operated on public roads, highways, or streets. It is intended for off-road, race, or closed-course competition use only, where such modifications are permitted.
By purchasing this product, you acknowledge and agree that:
You are responsible for compliance with all applicable emissions laws and regulations.
MAD and its affiliates disclaim any liability for improper or unlawful use of this product.
Use of this part on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws.
Please check your local laws before purchase and 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.