
Upgrade your BMW 840i with the ARMYTRIX BM164-C Stainless Steel Exhaust System, designed to enhance performance while delivering an exhilarating sound experience. This precision-engineered system not only boosts power, particularly in the low to mid RPM range, but also reduces weight, resulting in a sportier and more responsive drive. The exhaust produces a deep, resonant tone that transforms your driving experience while effectively neutralizing undesirable frequencies at critical RPMs.
What sets the ARMYTRIX exhaust apart is its innovative Valvetronic Control. This smart system features a Throttle Pedal Sensor and Engine RPM Signal Auto Functions, allowing you to enjoy a seamless transition between quiet and aggressive exhaust notes. At low RPMs, the valves close to maintain backpressure, ensuring a smooth launch. As you accelerate, the valves automatically open, enhancing airflow for increased horsepower and torque, and delivering that thrilling sound you crave.
Key Features:
- Integrates seamlessly with OE Valvetronic Control
- Includes Front Pipe (BM164-F)
- Features Mid Pipes (BM164-ML + BM164-MR)
- Equipped with Valvetronic Muffler (BM164-VM)
Fitment:
- BMW 840i G14/G15 Gran Coupe Non-OPF (2019+)
- BMW 840i xDrive G14/G15 Gran Coupe Non-OPF (2019+)

How Valvetronic Works:
The Valvetronic System allows you to control the sound of your exhaust with ease. Whether you're leaving for work early or hitting the open road, you can adjust the volume with a simple push of a button, either via the included remote or through a smartphone app. This system connects to your engine's vacuum source, allowing you to manage the exhaust valves based on your driving style or preferences.
When the valves are open, expect an aggressive sound that complements your turbocharged engine, allowing for improved exhaust flow and potentially increased boost pressure. This means not just a louder growl, but also a noticeable gain in horsepower, making your BMW 840i truly stand out on the road.




Experience the thrill of driving your BMW 840i like never before with the ARMYTRIX BM164-C Exhaust System. It's not just an upgrade; it's a complete transformation of how you connect with your vehicle.
This product ships direct from the manufacture in Taiwan. Customer is responsible for any additional customs and duties charged by the carrier.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
When it comes to enhancing your vehicle's performance, Armytrix stands out as a brand synonymous with quality, innovation, and a passion for automotive excellence. Founded with the vision to revolutionize the aftermarket exhaust industry, Armytrix has carved a niche for itself by blending cutting-edge technology with a deep understanding of automotive enthusiasts' needs.
The Legacy of Armytrix: A Brand Built for EnthusiastsArmytrix was born from a desire to create high-performance exhaust systems that not only improve the sound and efficiency of vehicles but also enhance the overall driving experience. With years of expertise in engineering and design, Armytrix has developed a reputation for crafting exhaust systems that deliver unrivaled performance and a distinct auditory experience. Their commitment to quality is evident in every product, making them a favorite among car enthusiasts around the globe.
Why Choose Armytrix?Armytrix specializes in a variety of performance parts, with a primary focus on exhaust systems. Their product lineup includes:
- Valvetronic Exhaust Systems
- Cat-Back Exhausts
- Downpipes
- Mid-Pipes
- Exhaust Tips
What sets Armytrix apart from the competition? It's their dedication to innovation and performance. The Valvetronic technology allows drivers to control the sound of their exhaust with the push of a button, providing a customizable experience that can switch from a refined purr to a roaring growl. This level of versatility is what every car enthusiast dreams of, giving you the power to adapt your vehicle's sound to match your mood or driving conditions.
Unmatched Quality and PerformanceArmytrix exhaust systems are crafted from high-grade materials, ensuring durability and longevity. The use of T304 stainless steel not only enhances the visual appeal of the exhaust but also resists corrosion, making it perfect for any environment. Each exhaust system undergoes rigorous testing to ensure it meets the highest standards of performance and sound quality, which is why Armytrix has earned the trust of countless automotive enthusiasts.
Join the Armytrix FamilyChoosing Armytrix means joining a community of like-minded individuals who share a passion for performance and style. The brand has established a strong presence in the automotive world, with a devoted following that appreciates the craftsmanship and engineering behind each product. Whether you're a weekend warrior or a daily driver, Armytrix has something to offer for every type of car enthusiast.
In conclusion, if you're looking to elevate your vehicle's performance and sound, look no further than Armytrix. With a legacy built on quality, innovation, and a deep understanding of your needs as a car lover, Armytrix is the go-to brand for high-performance exhaust systems. Experience the difference today and take your driving experience to the next level with Armytrix!
Upon receiving the product(s), it is the buyer's personal responsibility to examine the conditions of the part(s) prior to installation. If any part(s) proving defective in material and/or workmanship, the buyer must document the defect(s), contact ARMYTRIX immediately and return the product(s) within 30 days. We will replace all defective items free of charge, but the transportation cost incurred will be at buyer's own expense.
Warranty shall be considered void if damages to the product(s) were due to improper installation and/or improper use, including, but not limited to: off-roading, racing, unauthorized alterations to the product(s), lack of care, impact damage and any other damages caused by using the product(s) other than intended by the manufacturer.
To protect the integrity and functionality of the exhaust system, in OFF Mode when 4500 RPM is reached or when turbo pressure reaches 0.8 bar, the valves will automatically open as a safety precaution. A friendly reminder, by de-catting the exhaust system the chances of triggering the 'Check Engine' signal are increased and our warranty does not cover this or other software incompatibilities. We recommend remapping the vehicle's ECU to prevent potential conflicts.
ARMYTRIX exhaust system(s) must be installed by certified technician(s) to maintain its warranty status. We reserve the right to withhold issuance of credit until defective part(s) has been returned and examined to determine reason of failure.
ARMYTRIX will not be responsible for any everyday wear-and-tear damages that occur in normal driving conditions; including, not limited to: man-made or natural damages to external surface, internal deterioration, discoloration, rust and corrosion. Wear-and-tears are unavoidable; we recommend regular check-ups and care to extend the product(s) lifespan and maintain its performance.
Sale price | None | ||||||||||||||||||
Wholesale price | $3,101.04 | ||||||||||||||||||
Shipping |
Weight: 150.00 Length: 55 Width: 24 Height: 12
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Product Added At | Thursday 09 December, 2021 | ||||||||||||||||||
Product Modified At | Monday 16 June, 2025 | ||||||||||||||||||
Imported By | ETLOverride | ||||||||||||||||||
Last Edited By | maemae.nds@gmail.com | ||||||||||||||||||
View In Admin |
Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
---|---|---|---|---|---|---|---|---|---|---|
Armytrix | $2,628.00 | $4,380.00 | ? | ? | ? | 2025-06-16 18:37:02 |
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