BMW G80 M3 / G82 M4 BEAST Cat-Back Exhaust | Non-Valved | Top Speed Pro-1 (2021–2025)

Top Speed Pro-1 BEAST Cat-Back Exhaust System

For BMW G80 M3 & G82 M4 3.0L Twin-Turbo (S58) | 2021–2025

Straight-Through Design | Non-Valved | Dual Resonator | 89mm Piping

Unleash raw sound and performance from your G8X BMW with the Top Speed Pro-1 BEAST Cat-Back Exhaust System. Engineered for enthusiasts who want maximum presence without the complexity of valve control, this system delivers a powerful, aggressive exhaust note while remaining refined enough for street driving.

The BEAST system features a non-valved straight-through design paired with a dual resonator chamber to reduce unwanted cabin drone at cruising speeds. Constructed with 89mm (3.5") mandrel-bent piping, precision TIG welding, and finished with oversized 102mm (4") slanted exhaust tips, this system offers both performance gains and bold visual impact.

Key Features

• Non-Valved Straight-Through Design – Consistent, aggressive sound at all times
• Dual Resonator Chambers – Controls interior drone at low RPM
• 89mm (3.5") Mandrel-Bent Piping – Improved airflow and reduced backpressure
• TIG-Welded T304 Stainless Steel – Durable, clean, and corrosion-resistant construction
• 102mm (4") Slanted Exhaust Tips – Bold styling with a premium finish
• Lighter Than Stock – Reduces rear-end weight and improves throttle response
• Actual product shown in images

Vehicle Fitment

• BMW G80 M3 Sedan: 2021–2025
• BMW G82 M4 Coupe: 2021–2025
• Engine: 3.0L Twin-Turbo S58
• Direct bolt-on using factory mounting points
• Valve system not required or reused

Sound Profile

This system produces a loud, deep, and aggressive exhaust tone with a throaty, race-inspired character. The dual resonator design helps eliminate rasp and minimize highway drone, delivering an intense exterior sound with a more controlled cabin experience.

Sound Disclaimer: Exhaust tone is subjective and may vary by vehicle setup and driving conditions. Returns will not be accepted based on sound level preference.

Shipping Information

Shipping rates shown apply to the contiguous 48 U.S. states. For shipments to Alaska, Hawaii, Puerto Rico, Guam, U.S. Virgin Islands, or international destinations, please contact us for a custom shipping quote.

Frequently Asked Questions

Q: Will this exhaust fit my BMW M3 or M4?
A: Yes. This system fits BMW G80 M3 Sedans and G82 M4 Coupes from 2021–2025 with the S58 3.0L twin-turbo engine.

Q: Does this exhaust use valves?
A: No. This is a non-valved straight-through system designed for consistent aggressive sound.

Q: How does it sound compared to stock?
A: The BEAST system is significantly louder and deeper than stock, with a strong, throaty tone and no rasp.

Q: Will there be highway drone?
A: No. The dual resonator chambers are designed to minimize interior drone during cruising.

Q: Is this system lighter than OEM?
A: Yes. It is lighter than the factory exhaust, helping improve performance and responsiveness.

Q: Can I return it if the sound is too loud?
A: No. Returns are not accepted based on sound preference.

Q: Do you ship internationally?
A: Yes. Shipping rates listed apply to the 48 U.S. states only. Please contact us for international or non-contiguous U.S. shipping quotes.

Upgrade your BMW G80 M3 or G82 M4 with the Top Speed Pro-1 BEAST Cat-Back Exhaust System for uncompromising sound, reduced weight, and aggressive motorsport styling.