Car Catless Exhaust Downpipe For 2020+ BMW F97 X3 M F98 X4 S58 3.0T

KYOSTAR Catless Downpipes for BMW F97 X3 M & F98 X4 M S58 3.0T 

The KYOSTAR Catless Downpipes are designed for BMW F97 X3 M and F98 X4 M models equipped with the S58 3.0T Twin-Turbo Inline-6 engine. These high-flow downpipes replace the restrictive factory catalytic converter sections to improve exhaust flow efficiency, reduce exhaust restriction, and enhance turbocharger response for performance-oriented BMW M SUV applications.

Featuring a catless dual downpipe design with optimized exhaust routing, these downpipes provide a more direct exhaust path from the S58 twin-turbo engine. Designed for tuned builds, track applications, and upgraded turbo setups, they deliver improved exhaust pulse flow and a more aggressive performance exhaust tone.

Features

• High-Flow Catless Design: Replaces factory catalytic converters to reduce exhaust restriction and improve exhaust flow efficiency.

• Turbo Response Advantage: Helps improve turbocharger response by providing a less restrictive exhaust path.

• Performance Exhaust Upgrade: Enhances exhaust pulse flow and delivers a deeper, more aggressive exhaust tone.

• S58 Performance Application: Designed specifically for BMW S58 3.0T Twin-Turbo performance SUV platforms.

• Tuned Build Support: Suitable for track vehicles, competition applications, and modified turbo setups requiring increased exhaust flow capacity.

Fitment

• 2020+ BMW F97 X3 M S58 3.0T

• 2020+ BMW F97 X3 M Competition S58 3.0T

• 2020+ BMW F98 X4 M S58 3.0T

• 2020+ BMW F98 X4 M Competition S58 3.0T

Notes

Compatible Vehicle: Designed for selected BMW F97 X3 M and F98 X4 M models equipped with the S58 3.0L Twin-Turbo Inline-6 engine only.

Incompatible Vehicle: Not compatible with standard X3/X4 models, X3 M40i, X4 M40i, B58, B48, diesel, hybrid, or other engine applications.

Verify Vehicle: Please verify your vehicle year, chassis code, engine code, factory downpipe layout, flange design, oxygen sensor locations, and exhaust connections before ordering.

Exhaust Configuration: Designed for BMW S58 factory-style exhaust layouts and compatible performance exhaust systems.

Exhaust layouts, sensor positions, flange designs, mounting points, and factory emissions equipment may vary by production date, model year, market, and previous modifications. Please compare your original downpipes and all connection points with the product photos before installation.

Emissions Notice: These catless downpipes remove the factory catalytic converters and may trigger a check-engine light without compatible ECU software. They are intended for off-road or competition applications only and may not comply with public road emissions regulations.

ECU Tune Reminder: Compatible ECU tuning or calibration is strongly recommended after installation to properly manage oxygen sensor readings and optimize engine performance.

Professional Installation: Additional gaskets, seals, clamps, mounting hardware, heat shielding, or minor adjustments may be required depending on vehicle configuration and existing exhaust modifications.

Product Details

FAQ

Q1: Will this fit my vehicle?

These KYOSTAR Catless Downpipes are designed for BMW F97 X3 M and F98 X4 M models equipped with the S58 3.0L Twin-Turbo Inline-6 engine. Please confirm your chassis, production year, and factory exhaust configuration before purchase.

Q2: Does installation require modification?

The downpipes are designed for compatible BMW S58 exhaust configurations. Installation requirements may vary depending on existing modifications, exhaust setup, and vehicle specifications. Professional installation is recommended.

Q3: Will this require ECU tuning?

Because these are catless downpipes, oxygen sensor-related warnings may occur after installation. ECU tuning or calibration is recommended to properly manage engine parameters and optimize performance.

Warranty & Shipping

KYOSTAR products are inspected before shipment to ensure quality and reliability. Each exhaust component is securely packaged to prevent transportation damage. Please contact our support team if you need assistance with installation or product-related issues.