The BMW S58 is built around a high-output twin-turbocharged platform, making exhaust flow an important part of a performance-focused build. The MAD S58 200-Cell Race Catted Downpipes are designed to reduce restriction in the downpipe section while retaining high-flow catalytic converters.

Developed for the F97 X3M and F98 X4M, these downpipes combine smooth-flowing 304 stainless steel tubing with 200-cell high-flow catalytic converters to create a less restrictive path for exhaust gases.

The result is increased exhaust flow, a deeper and more aggressive exhaust note, and additional performance potential from the S58.

200-Cell High-Flow Catalytic Converters

The key component of the MAD downpipes is the integrated 200-cell high-flow catalytic converter.

Compared with more restrictive factory components, the high-flow catalyst design is intended to allow exhaust gases to move more efficiently through the downpipes. This can help support increased horsepower, torque, and throttle response, particularly when combined with other performance modifications.

On stock turbochargers, MAD states that the downpipes can support gains of up to 30 horsepower, while upgraded turbo configurations can provide additional performance potential depending on the overall setup and calibration.

These are performance-oriented race catted downpipes and do not include a check-engine-light guarantee.

304 Stainless Steel Construction

The downpipes are manufactured from 304 stainless steel, providing the durability required for an environment exposed to high exhaust temperatures and demanding operating conditions.

The tubing features smooth mandrel-bent sections to maintain consistent flow through the downpipe assembly. Integrated flex sections also help accommodate movement and vibration within the exhaust system while supporting long-term durability.

Designed to Improve S58 Exhaust Flow

Every part of the downpipe design is focused on improving the path from the turbochargers into the rest of the exhaust system.

The smooth bends and high-flow catalyst configuration work together to minimize unnecessary restrictions. This freer-flowing design can contribute to stronger throttle response and increased power potential while also giving the S58 a more pronounced exhaust character.

The resulting sound is deeper and more aggressive without being specifically designed around excessive drone.

Direct-Fit Installation

The MAD S58 downpipes are designed as a direct-fit, bolt-on replacement for the factory downpipes.

Installation does not require cutting or welding, and the downpipes are designed to connect directly to the factory exhaust system. They are also compatible with most aftermarket exhaust systems, giving owners the flexibility to upgrade additional sections of the exhaust later.

The fitment is designed to accommodate both left-hand-drive and right-hand-drive vehicles.

Built for the F97 X3M and F98 X4M

These downpipes are specifically designed around the S58-powered BMW X3M and X4M platforms.

Fitment

• 2020+ BMW X3M F97
• 2020+ BMW X3M Competition F97
• 2020+ BMW X4M F98
• 2020+ BMW X4M Competition F98

Whether the vehicle retains its factory turbochargers or is being developed around a more extensively modified S58 setup, the MAD 200-cell downpipes provide a high-flow foundation for the exhaust system.

Key Features

• 200-cell high-flow catalytic converters
• Designed for the BMW S58
• 304 stainless steel construction
• Smooth mandrel-bent tubing
• Integrated flex sections
• Supports improved exhaust flow
• Up to 30 horsepower potential on stock turbochargers
• Compatible with stock and most aftermarket exhaust systems
• Direct bolt-on installation
• No cutting or welding required
• Compatible with LHD and RHD vehicles
• Lifetime warranty against manufacturing defects and fitment issues
• No check-engine-light guarantee

Race Use Only

The MAD S58 200-Cell Race Catted Downpipes are intended for off-road, race, or closed-course competition use only where permitted.

They are not legal for sale or use on pollution-controlled vehicles operated on public roads, highways, or streets. Installation or operation on public roads may violate the Federal Clean Air Act and applicable state emissions regulations.

Buyers are responsible for verifying and complying with all applicable federal, state, and local emissions laws before purchasing or installing this product.

Upgrade the S58 Downpipe Section

For F97 X3M and F98 X4M owners looking for increased exhaust flow without moving to a completely catless setup, the MAD 200-Cell Race Catted Downpipes provide a high-flow alternative built around the S58 platform.

With 200-cell catalytic converters, 304 stainless steel construction, smooth-flowing bends, flex sections, and direct-fit installation, the system is designed to support additional performance while giving the X3M and X4M a deeper, more aggressive exhaust character.

Shop the MAD BMW S58 X3M/X4M 200-Cell Catted Downpipes: https://mad-us.com/mad-bmw-s58-x3m-x4m-catted-high-flow-200-cell-downpipes/