KYOSTAR Valved Catback Exhaust System for 2019-2025 BMW F91 F92 F93 M8 S63 4.4L Twin Turbo V8 Performance Exhaust Kit

KYOSTAR Valved Catback Exhaust System for 2019-2025 BMW F91 F92 F93 M8 S63 4.4L Twin Turbo V8 Performance Exhaust Kit

Upgrade your BMW M8 with the KYOSTAR Valved Sport Catback Exhaust System. Designed for compatible 2019-2025 BMW F91, F92, and F93 M8 models equipped with the S63 4.4L twin-turbocharged V8 engine, this aftermarket exhaust system offers a performance-focused alternative to the factory center and rear exhaust assembly.

Featuring a valved exhaust configuration and vehicle-specific exhaust routing, the KYOSTAR Catback Exhaust System is intended for BMW enthusiasts who want to personalize their M8's exhaust character while maintaining a dedicated catback-style layout.

Whether you're upgrading an M8 Coupe, M8 Convertible, or M8 Gran Coupe, this system provides a center and rear exhaust upgrade designed around the distinctive BMW M8 platform.

Features

• Valved sport catback exhaust system for compatible BMW M8 applications.
• Designed for BMW S63 4.4L twin-turbocharged V8 engine applications.
• Listed for BMW F91, F92, and F93 M8 models.
• Valved exhaust configuration for a performance-oriented exhaust setup.
• Catback layout replaces the compatible center and rear exhaust sections.
• Performance-inspired exhaust routing as shown in the product image.
• Vehicle-specific exhaust configuration for the listed BMW M8 platform.
• Designed for enthusiasts seeking a different exhaust tone and character.
• Center and rear exhaust upgrade without replacing the factory downpipes.
• Silver-colored metal exhaust tubing appearance.
• Suitable for compatible BMW M8 street-performance builds.
• Catback-style exhaust assembly as shown in the product image.

Fitment

BMW M8 Applications:

• 2019-2025 BMW M8 Convertible (F91) — as applicable to production year and market.
• 2019-2025 BMW M8 Coupe (F92) — as applicable to production year and market.
• 2019-2025 BMW M8 Gran Coupe (F93) — as applicable to production year and market.

Engine: BMW S63 4.4L Twin-Turbocharged V8

Exhaust Configuration: Valved Sport Catback Exhaust System

Important Fitment Note

Please verify your BMW M8 chassis, production year, engine configuration, and factory exhaust layout before ordering.

This product is listed for compatible BMW F91/F92/F93 M8 models equipped with the S63 4.4L twin-turbocharged V8 engine.

The source-listed 2019-2025 range should not be interpreted as confirmation that every M8 body style was available in every model year or market.

Compatibility with BMW 840i, M850i, or other non-M8 BMW 8 Series configurations is not confirmed.

Before purchase, verify the factory exhaust connection points, exhaust hangers, rear bumper outlet arrangement, valve components, and available underbody clearance.

Vehicles equipped with aftermarket downpipes, modified rear bumpers, or non-factory exhaust components may require additional fitment verification.

Fitment Note

The KYOSTAR Valved Sport Catback Exhaust System is intended for compatible BMW M8 models equipped with the S63 twin-turbocharged V8 engine.

A catback exhaust system replaces the exhaust sections downstream of the catalytic converter connection, typically including the center and rear exhaust components.

This product features a valved exhaust configuration. However, the exact valve actuation method, control module requirements, and compatibility with factory electronic valve controls are not specified in the supplied product information.

A valved exhaust system can provide different exhaust characteristics depending on valve position and the installed control arrangement. Actual exhaust sound, volume, and valve behavior depend on the complete vehicle configuration.

Before installation, compare the existing factory exhaust with the product images and verify the upstream connections, exhaust routing, hanger locations, valve connections, and rear outlet alignment.

The supplied specifications do not establish the exact pipe diameter, stainless steel grade, wall thickness, system weight, sound level, or tested horsepower and torque gains.

No specific numerical performance improvements are claimed without supporting vehicle-specific testing.

Professional installation is recommended. Confirm the valve-control requirements and included hardware before installation.

Product Details

Why Upgrade Your Factory Exhaust?

The factory BMW M8 exhaust system is engineered to balance everyday comfort, exhaust sound, emissions requirements, and the refined character of a high-performance grand touring vehicle.

A performance catback exhaust changes the center and rear exhaust configuration, allowing enthusiasts to personalize the sound and appearance of their S63-powered BMW.

The KYOSTAR Valved Sport Catback Exhaust System is intended for drivers who want a performance-oriented exhaust layout with a valved configuration.

Actual exhaust tone, volume, and driving experience depend on the factory or aftermarket downpipes, valve operation, engine calibration, and other vehicle modifications.

FAQ

Q: What BMW models does this exhaust fit?
A: It is listed for compatible BMW F91/F92/F93 M8 applications equipped with the S63 4.4L twin-turbocharged V8 engine.

Q: Will this fit a BMW F92 M8 Coupe?
A: The F92 M8 Coupe is included in the listed applications. Please verify the production year and factory exhaust configuration.

Q: Will this fit a BMW F91 M8 Convertible?
A: The F91 M8 Convertible is included in the listed applications. Confirm the exact production year and exhaust layout before ordering.

Q: Will this fit a BMW F93 M8 Gran Coupe?
A: The F93 M8 Gran Coupe is included in the listed applications. Verify the vehicle's exhaust configuration before purchase.

Q: Is this a complete catback exhaust system?
A: Yes. The product is listed as a valved sport catback exhaust system for the compatible center and rear exhaust sections.

Q: Does this exhaust have valves?
A: Yes. The product is listed as a valved exhaust system.

Q: Can I control the valves using the factory BMW settings?
A: Factory valve-control compatibility is not specified. Please confirm the required control arrangement before ordering.

Q: Does this exhaust include a remote control?
A: A remote control is not confirmed in the supplied product information. Please verify the included valve-control accessories before purchase.

Q: Will this make my BMW M8 louder?
A: A performance catback exhaust may change exhaust volume and tone. Actual sound depends on the vehicle and valve configuration.

Q: Does this replace the factory downpipes?
A: No. A catback system replaces exhaust components downstream of the catalytic converter connection, not the factory downpipes.

Q: Will this fit a BMW M850i?
A: Compatibility with BMW M850i models is not confirmed.

Q: Does this exhaust increase horsepower?
A: No verified dyno data is provided, so no specific horsepower or torque gain is claimed.

Q: Does this require ECU tuning?
A: An ECU tuning requirement is not specified. Please verify based on your vehicle and existing modifications.

Q: Will this work with aftermarket downpipes?
A: Compatibility depends on the connection dimensions and exhaust layout. Additional verification may be required.

Q: Is professional installation recommended?
A: Yes. Professional installation is recommended to ensure proper alignment, valve operation, and secure mounting.

Installation Note

Allow the exhaust system to cool completely before installation. Securely raise and support the vehicle using appropriate lifting equipment and manufacturer-approved lifting points.

Inspect the factory center and rear exhaust sections and verify that the KYOSTAR catback assembly matches the intended mounting and connection locations.

Install the exhaust components using the appropriate hardware and installation procedures for the specific vehicle. Confirm valve-control requirements before connecting electrical or vacuum-operated components.

After installation, inspect all exhaust joints, hangers, valve components, rear outlet alignment, and surrounding underbody clearance. Check for exhaust leaks, unwanted vibration, and interference before driving.

Professional installation is recommended.

Warranty & Shipping

Please review the applicable KYOSTAR warranty terms before purchasing. Warranty coverage, duration, and exclusions are subject to the policy in effect at the time of purchase.

Inspect the product upon delivery for visible shipping damage, missing accessories, or other concerns. Retain the original packaging and contact KYOSTAR customer support if an issue is identified.

Before installation, verify that the received product matches SKU NA-CB-5101-SS-MB and your intended BMW M8 application.

Exhaust noise and modification regulations vary by location. Please confirm applicable local requirements before installation or road use.

For fitment assistance, valve-control questions, installation support, shipping information, or after-sales service, please contact KYOSTAR customer service.