BMW F97, F98/ X3M, X4M Catless Downpipe

BMW F97/F98 X3M/X4M Catless Downpipe

Unlock the true performance of your BMW X3M or X4M with this Catless Downpipe — engineered to maximise exhaust flow, improve turbocharger efficiency, and deliver the aggressive sound and power the S58 engine was built for.

Designed specifically for the BMW F97 X3M and F98 X4M, this catless downpipe replaces the restrictive factory catalytic converters with a completely unrestricted exhaust path, dramatically reducing exhaust backpressure. The result is faster turbo spool, sharper throttle response, increased horsepower and torque potential, and significantly enhanced exhaust acoustics.

Manufactured from premium T304 stainless steel with precision TIG welding and mandrel-bent tubing, this downpipe is built to withstand extreme temperatures and demanding driving conditions while delivering outstanding durability and corrosion resistance.

Whether you're building a dedicated track vehicle or looking to extract maximum performance from your S58-powered SUV, this Catless Downpipe is one of the most effective bolt-on upgrades available.

Key Features

Catless High-Flow Design

Eliminates the restrictive factory catalytic converters to maximise exhaust flow and minimise exhaust backpressure.

Premium T304 Stainless Steel Construction

Manufactured from high-quality corrosion-resistant stainless steel for exceptional durability and heat resistance.

Maximum Exhaust Flow

Provides the least amount of exhaust restriction for improved turbocharger efficiency and engine performance.

Mandrel-Bent Tubing

Maintains a consistent internal diameter for smooth, unrestricted exhaust flow.

Precision TIG Welded

Engineered for superior strength and long-term reliability in high-performance applications.

Direct Bolt-On Fitment

Designed specifically for the BMW F97 X3M and F98 X4M using factory mounting locations for straightforward installation.

Performance Benefits

• Increased horsepower and torque potential
• Faster turbo spool
• Sharper throttle response
• Reduced exhaust backpressure
• Enhanced turbocharger efficiency
• More aggressive exhaust note
• Increased turbo spool acoustics
• Ideal foundation for Stage 2 and higher-performance builds

Performance gains may vary depending on ECU calibration, fuel quality, and supporting modifications.

Sound Characteristics

Compared to the factory downpipes, the Catless Downpipe provides:

• Noticeably louder exhaust note
• Deeper and more aggressive exhaust tone
• Increased turbo spool noise
• Enhanced crackles, pops, and overrun (when tuned)
• Raw motorsport-inspired sound throughout the entire rev range

Vehicle Fitment

BMW F97 X3M (2019–2024)
BMW F97 X3M Competition (2019–2024)

BMW F98 X4M (2019–2024)
BMW F98 X4M Competition (2019–2024)

3.0L Twin-Turbocharged S58 Engine

Please Note

Professional installation is strongly recommended.

Catless downpipes are intended for off-road, motorsport, or race-use applications where permitted by local laws.

Installation of catless downpipes may illuminate the Check Engine Light (CEL). An ECU tune or suitable emulator may be required depending on your vehicle and market specification.

ECU tuning is recommended to maximise performance and achieve the full benefits of the upgraded downpipe.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.