Armytrix BMW M3/M4 Cat-Back Exhaust System is a truly incredible system for the F8X platform, offering a noticeable power gain, weight saving and noise enhancement over standard.
The system has been thoroughly engineered to reduce back pressure, maximising air flow efficiency for better throttle response and a faster turbo spool. It offers an upgraded valve system that is fully controllable using the Armytrix key fob, allowing you to take ownership of your vehicle's exhaust sound.
Crafted using high-grade aluminium, the system is highly resistant to corrosion and extremely durable in the long term.
PRODUCT SPECIFICATION
- Power gain of +26.3 bhp
- Torque increase of +33.4 Nm
- Weight saving of -3.8kg
- High-grade aluminium construction
- Upgraded valve system
COMPATIBILITY
- BMW F80 M3 Saloon
- BMW F82 M4 Coupe
- BMW F83 M4 Convertible
- Suitable for both standard & competition variants
WHAT'S IN THE BOX?
- Full Armytrix exhaust system
- DOES NOT INCLUDE downpipes
- Key fob for valve control
Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.
It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.
We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.
We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.
All in stock products ship the same day if ordered before 2pm GMT
For out of stock items we will contact you with an estimated wait time if not otherwise specified above.
We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy
All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.