Top Speed Pro1 BEAST Catback Exhaust System – BMW G80 M3 / G82 M4 (2021–2025)
Straight-Through Design | No Valves | Dual Resonator | 89mm Piping
Take your G8X M3 or M4 to the next level with the Top Speed Pro1 BEAST Catback Exhaust System, designed for pure sound and performance. Built without valves, this straight-through system features a dual resonator chamber to control cabin drone while preserving an aggressive exhaust note.
Crafted with 89mm (3.5") mandrel-bent piping, precision TIG welds, and massive 102mm (4") slanted tips, the BEAST system delivers a deep, throaty tone that’s loud on throttle yet surprisingly refined inside the cabin.
Key Features:
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No Valves – Straight-Through Design for consistent, aggressive sound
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Dual Resonator Chamber – Controls cabin drone at low RPMs
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Mandrel-Bent 89mm (3.5") Piping – Smoother airflow and reduced backpressure
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TIG Welded T304 Stainless Steel – Durable, clean construction
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Oversized 102mm (4") Slanted Tips – Bold styling and premium appearance
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Lighter than Stock System – Enhanced performance and throttle response
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Actual Product Images Shown
Vehicle Fitment:
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BMW G80 M3 Sedan (2021–2025)
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BMW G82 M4 Coupe (2021–2025)
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Fits all 3.0L Twin Turbo S58 engines
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Compatible with factory mounting points (valves are not required or reused)
Sound Profile:
This system produces a loud, deep, and aggressive exhaust tone without rasp or drone. Perfect for enthusiasts who want a powerful sound experience without the complexity of valve systems.
⚠️ Sound Disclaimer:
Exhaust sound is subjective and may vary by vehicle and driving conditions.
Returns will not be accepted based on sound level preferences.
Shipping Information:
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Shipping rates shown are valid for the 48 contiguous U.S. states only.
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For shipping to Alaska, Hawaii, Puerto Rico, Guam, U.S. Virgin Islands, or international destinations, please contact us for a quote.
❓ Frequently Asked Questions
Will this exhaust fit my BMW M3 or M4?
Yes. This system fits BMW G80 M3 Sedans and G82 M4 Coupes from 2021 to 2025 with the S58 3.0L twin-turbo engine. It is a direct bolt-on upgrade.
Does this exhaust use valves?
No. This version is a straight-through system without valves. It delivers a consistent aggressive sound and does not integrate with the OEM valve system.
What’s the sound like compared to stock?
This system is much louder and deeper than stock. It offers a throaty, race-inspired tone with no rasp and includes resonators to eliminate cabin drone.
Will I get drone on the highway?
No. The dual resonator design minimizes interior drone while maintaining a powerful exterior tone.
Is this system lightweight?
Yes. The BEAST catback is lighter than the OEM system, helping to reduce rear-end weight and improve performance.
Can I return it if I don't like the sound?
Unfortunately, returns are not accepted based on sound preference. Exhaust tone is subjective and affected by vehicle setup and driving style.
Do you ship internationally?
Yes. Shipping rates listed are for the 48 U.S. states only. For Alaska, Hawaii, Puerto Rico, Guam, U.S. Virgin Islands, or international orders, please contact us for a quote.
