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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
AMS Alpha 3" Stainless Steel Downpipes w/ Catalytic Converter | BMW M5 F10 4.4L Bi-TurboThe AMS Alpha M5 Downpipes are the ultimate solution for improving power, throttle response and exhaust note without sacrificing quality, fitment or design. Each Alpha M5 Downpipe features a smooth transition from their massive 3. 5" inlet down to the 3" tubing for optimum flow. While competitors choose a very short transition length which creates turbulence and hurts exhaust flow and power, the AMS Engineering team implemented a longer length to give
The AMS Alpha M5 Downpipes are the ultimate solution for improving power, throttle response and exhaust note without sacrificing quality, fitment or design. Each Alpha M5 Downpipe features a smooth transition from their massive 3.5" inlet down to the 3" tubing for optimum flow. While competitors choose a very short transition length which creates turbulence and hurts exhaust flow and power, the AMS Engineering team implemented a longer length to give your M5 maximum output.These downpipes are properly designed and engineered using a CMM Laser Scanner for a perfect fit and space optimization. AMS took the time to integrate the factory O2 sensors, heat shielding and brackets for a clean and proper OEM-like installation. Another unique benefit is the racing catalytic converter. These 300 cell count units provide nearly no disruption in flow and feature a staked in design to hold the catalyst firmly in place.
Features:
- .065" thick, 100% 304 stainless steel tubing
- Big increases in power throughout the powerband
- Improved turbo & throttle response
- Premium 300 cell race catalytic converters
- Exotic exhaust note
- Massive 3.5" primary inlets
- Precise and proper fitment using factory heat shielding
- Includes ALL necessary parts and hardware for installation
- BMW M5 (F10) 4.4L Bi-Turbo 12-16
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1899 reviews
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Product Reviews
★★★★★ 3
Good quality, but hard
Color: Brown
The leather and metal seem to be of very good quality. My son bought this as his office/study chair. He is starting medical school and liked the professional look of this chair. He is 6’ tall and 200lb. There does not seem to be an issue with the chair rolling even with his weight. The chair is very ‘hard’ not that comfortable if you need to sit in it for long periods. Since my son needs to be staying awake to study, this will work for him as he won’t be able to get too comfortable and fall asleep.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Easy assembly and smooth movement
This chair has been a great addition to my home office. The assembly instructions are simple and easy to follow.
The height adjusts smoothly, and the chair is very comfortable. I sit at my desk for about 9 hours a day, and this chair makes it easy to stay seated and work for long hours without discomfort. The cushioning and back support are solid.
It spins well, and the wheels move smoothly. The build quality feels sturdy and reliable.
Overall, a great value and a solid choice for anyone with a desk job. Highly recommend.
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Great chair
Color: Brown
Love this chair. Very comfortable and supportive. Color matches my leather couch perfectly. Time consuming to put together.
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Reviewed in the United States on June 5, 2026
★★★★★ 5
Beautiful and very steady office chair
Color: Brown, Color: Brown
Beautiful, Ergonomic, and very steady for this good quality leather office chair. The side armrests and the back support are very comfortable to seat. The assembly instruction and illustrated photos are quite simple to follow which make ease of assembly. I got the brown color leather which matches perfectly with my desk. Overall , I am very please with this office chair
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Excellent materials
Number of Items: 2
Incredible craft with this chair. For the price point it could definitely be over double the current price. Comfortable, easy to assemble and excellent materials.
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Reviewed in the United States on June 8, 2026