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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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Description
Dinan Free Flow Axle-Back Exhaust for 2017-2020 BMW 440i D660-0077Dinan Free Flow Axle Back Exhaust 2017 2020 BMW 440i Dinan engineers designed the F33 F36 440i exhaust to improve exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Not only is the tone improved but the additional burbles and pops that come with it are simply intoxicating. Dinan also incorporates a Helmholtz
Dinan Free Flow Axle-Back Exhaust - 2017-2020 BMW 440i
Dinan engineers designed the F33/F36 440i exhaust to improve exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Not only is the tone improved but the additional burbles and pops that come with it are simply intoxicating. Dinan also incorporates a Helmholtz chamber design that reduces resonance or"drone" at low RPM.
Features:
- More Power: +?6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
- Helmholtz chamber to reduce drone
- Enjoyably louder, sportier sound
- Twin 89mm (3.5") laser engraved, polished or ceramic black?exhaust tips
- 100% 304 stainless steel construction
- Uses the factory brackets and hangers for a factory-like fitment
Specs:
| Brand | Dinan |
|---|---|
| Dinan Point Value | 3 |
| Emission Code | 5 |
| Height | 11 |
| Labor Time (Hours) | 1.2 |
| Length | 48 |
| Max HP Gain | 6 @ 6600 RPM |
| Max Torque (lb-ft) Gain | 5 @ 6600 RPM |
| Product Type | Axle-Back Exhaust |
| Sale Category | Exhaust |
| Tip Finish | Polished |
| Warning | California Proposition 65 |
| Weight | 45 |
| Width | 30 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2020 | BMW | 440i | Base |
| 2017-2020 | BMW | 440i xDrive | Base |
| 2017-2020 | BMW | 440i Gran Coupe | Base |
| 2017-2020 | BMW | 440i xDrive Gran Coupe | Base |
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
4.9 ★★★★★
Based on 169 reviews
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Product Reviews
★★★★★ 5
Easy to assemble and install
Color: White, Style: Wall Cabinet, Color: White, Style: Wall Cabinet
This cabinet meets our need for more bathrooms storage without interfering with the space in our smallish bathroom. The package arrived well packed in cardboard with foam inserts to protect the parts from damage in transit. I was able to easily follow the included directions with minimal fuss. In several cases, extra hardware piece were included, which I really appreciated. The quality of the construction was excellent. The only this that concerned me was the weight bearing capability of the included shelves. I added a few liquid or lotion filled bottles and noticed the shelves sagging, so I may have to cut my own shelves to better support. The cabinet looks great and is exactly as pictured in the listing after I assembled it. The ability to customize the shelves is also helpful. I looked at several cabinets for this purpose, some more expensive, some less, and I am happy with the money spent for this cabinet.
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Reviewed in the United States on July 28, 2025
★★★★★ 5
Great bathroom cabinet!
Color: White, Style: Wall Cabinet
My husband mounted this cabinet over our toilet and it’s the perfect addition! It looks great, matches the cabinets we already have and adds much needed storage! I plan on buying a second to put in my daughter’s/ the guest bathroom. The doors are magnetic and close securely, and the shelves are adjustable and feel sturdy. It was very easy to put together and feels very secure mounted on the wall
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Reviewed in the United States on June 28, 2025
★★★★★ 5
Great Purchase!
Color: White, Style: Wall Cabinet
Great quality. Easy to put together. Looks great!
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Reviewed in the United States on May 4, 2026
★★★★★ 4
Mounting process could have been easier but still a beautiful cabinet
Color: White, Style: Wall Cabinet, Color: White, Style: Wall Cabinet
Beautiful cabinet seems to be good quality I just keep admiring something so beautiful about the white. The extra hardware is thoughtful.
With some master skills I was able to get it mounted perfect. It was not a breeze but nonetheless I always find a way.
I found the best way to mount this was to hold it against the wall and follow the pre-drilled holes at the bottom to drill the holes into the wall that wasnt that hard
But for the top anchor/screws, the cabinet did not have pre-drilled holes and I was not about to guess !! So I used alien tape to tape the top wood bar to the unit as shown in pic then took the cabinet lined up the bottom holes while holding the cabinet up then I drilled holes through the unit with a small bit just to get the whole going then took it back down then followed the same holes with a bigger bit and it worked for me. It hung level.
It was crazy that the pre-holes were not 16” apart when they could have been. I added extra screws to be able to mount them to a stud I didn’t feel comfortable with it not being mounted to a stud. The screws I had were too long gonna have to get some shorter screws. But it’s up & looks so nice
DO NOT USE 11/32 bit. Don’t even use 5/16. I use 1/4 and kinda ran the drill in a circle to widen the whole and it was the perfect tight fit
All in all I do love the cabinet. Just feel the mounting process could have been instructed more conveniently
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Love it !!!!
Color: White, Style: Wall Cabinet, Color: White, Style: Wall Cabinet
I absolutely love this cabinet. It’s super well-made easy to put together and the space is great. I’ve already received some compliments. Thought it would guests. Come to my home. Just look at how nice it pairs with my bathroom. The handles are sturdy. There’s also a nice tag inside with the company’s name. If you’re looking for a bathroom cabinet, highly recommended this one is well worth it. Love it!!!
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Reviewed in the United States on February 19, 2026