KYOSTAR Valved Cat Back Straight Pipe Exhaust System 304 Ss For 2025+ BMW G90 G99 M5 S68 4.4T V8

KYOSTAR Valved Sport Catback Exhaust System for BMW G90 G99 M5 S68 4.4T Twin-Turbo V8 Engine

The KYOSTAR Valved Sport Catback Exhaust System is designed for 2025+ BMW G90 M5 and G99 M5 Touring models equipped with the S68 4.4T twin-turbo V8 engine. Developed as a high-performance exhaust upgrade, this system improves exhaust flow efficiency, enhances the aggressive V8 exhaust character, and provides adjustable sound control through an integrated valve system.

Manufactured from durable stainless steel with precision fabrication, the KYOSTAR valved catback exhaust system delivers improved exhaust performance, enhanced rear styling, and reliable operation under demanding driving conditions. The 4-tip performance design complements BMW M styling while allowing drivers to switch between a refined cruising tone and a more aggressive sport exhaust sound.

Features

• Valved exhaust design provides adjustable sound control between comfortable cruising and aggressive performance modes.

• Stainless steel construction offers excellent heat resistance, corrosion protection, and long-term durability.

• Optimized exhaust flow design helps reduce restriction and enhances the S68 twin-turbo V8 exhaust response.

• 4-tip performance exhaust design improves rear appearance with a premium BMW M-inspired styling upgrade.

• Direct-fit catback system is engineered specifically for BMW G90 M5 and G99 M5 Touring applications.

Fitment

• 2025+ BMW G90 M5

• 2025+ BMW G99 M5 Touring

Notes

Compatible Vehicle: Designed for BMW G90 M5 and G99 M5 Touring models equipped with the S68 4.4T twin-turbo V8 engine.

Incompatible Vehicle: Not compatible with BMW F90 M5, S63 engine platforms, or other non-G90/G99 exhaust configurations.

Verify Vehicle: Please confirm your vehicle Year, Chassis, Engine configuration, and factory exhaust system before ordering.

Installation: Professional installation is recommended to ensure correct exhaust alignment, valve operation, and proper sealing.

Product Details

FAQ

Q1: Will this fit my vehicle?

The KYOSTAR Valved Sport Catback Exhaust System is designed for 2025+ BMW G90 M5 and G99 M5 Touring models equipped with the S68 4.4T twin-turbo V8 engine. Please confirm your vehicle Year, Chassis, and Engine before purchase.

Q2: Does installation require modification?

This catback exhaust system is designed for direct installation using factory-style mounting locations. Professional installation is recommended to ensure proper fitment and valve operation.

Q3: Does this require ECU tuning?

No ECU tuning is required for this catback exhaust upgrade. Since the system is installed after the catalytic converter, it typically does not affect engine calibration or require additional tuning.

Q4: What performance benefits does this provide?

The KYOSTAR valved catback exhaust improves exhaust flow, enhances S68 V8 exhaust sound, provides adjustable volume control, and delivers a more engaging performance driving experience.

Professional installation is recommended.

KYOSTAR products are quality inspected before shipment. Please contact our support team for installation assistance or after-sales support.