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Description
Dinan Free Flow Axle-Back Exhaust for 2020-2024 BMW M340i/M440i D660-0085-BLKDinan Free Flow Axle Back Exhaust 2020 2024 BMW M340i M440i Quad exhaust tips have been a signature feature of the most powerful letter in the automotive sphere for quite some time. It is a hallmark of the brand that Dinan has long embraced, limiting its own quad tip usage to those M cars that already sported like tip quantity from the factory. That is? until now with the release of the Dinan axle back exhaust system for the G20 M340i and G2x M440i.
Dinan Free Flow Axle-Back Exhaust - 2020-2024 BMW M340i/M440i
Quad exhaust tips have been a signature feature of the most powerful letter in the automotive sphere for quite some time. It is a hallmark of the brand that Dinan has long embraced, limiting its own quad tip usage to those M cars that already sported like tip quantity from the factory. That is? until now with the release of the Dinan axle back exhaust system for the G20 M340i and G2x M440i.
Features:
- More Power: +?6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
- Enjoyably louder, sportier sound
- Quad 4" diameter clamp-on, double-walled, ceramic black and laser engraved exhaust tips
- 100% 304 stainless steel construction
- Larger diameter piping for increased flow (76mm vs 70mm)
- 4 lbs lighter than the stock system
- Stock exhaust valve actuator reused and another valve/actuator added to the opposing side promoting even flow regardless of valve position
- Computer controlled exhaust valves are retained and limit noise during low speed driving and open fully during high-load conditions
- Twin exhaust valves are a whopping 76mm diameter, making them 30% less restrictive than the OE valves
- Easy bolt-on installation with included mounting hardware
Specs:
| Brand | Dinan |
|---|---|
| Dinan Point Value | 3 |
| Emission Code | 5 |
| Height | 10 |
| Labor Time (Hours) | 2.5 |
| Length | 54 |
| Max HP Gain | 6 @ 6600 RPM |
| Max Torque (lb-ft) Gain | 5 @ 6600 RPM |
| Product Type | Axle-Back Exhaust |
| Sale Category | Exhaust |
| Tip Finish | Black Ceramic Coated |
| Warning | California Proposition 65 |
| Weight | 68 |
| Width | 29 |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2024 | BMW | M340i | Base |
| 2020-2024 | BMW | M340i xDrive | Base |
| 2021-2024 | BMW | M440i xDrive | Base |
| 2021-2024 | BMW | M440i | Base |
| 2022-2024 | BMW | M440i | Base |
| 2022-2024 | BMW | M440i xDrive Gran Coupe | Base |
| 2022-2024 | BMW | M440i 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
4.3 ★★★★★
Based on 1458 reviews
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Product Reviews
★★★★★ 5
Cute chew toy for smaller dogs!
Color: Red, Color: Red
Soooo my new puppy Dottie was continually eating my favorite pair of crocs by sneaking into my closet. To solve this issue I thought I would buy her her own chewy croc and actually found one on Amazon! lol
The chew toy is actually heavy and weighted and the material is hard enough for an effective teething toy but soft enough for the puppy to play with! My little Weeney dog loved it the second I took it out of the package! The fake croc chew toy is a very cute design with a fun, bright color. The chew toy material is constructed of durable rubber and will last a long time. I didn't like that it doesn't make noise and is small.. I believe it is better suited for smaller breads to use which was perfect for my puppies needs.
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Reviewed in the United States on September 24, 2025
★★★★★ 5
You should have one on standby.
Color: Yellow, Color: Yellow
This product was great for my teething Bully puppy, she, is an aggressive chewer. It gave her relief and kept her busy. In the 6 or 7 weeks that we've had it, it stood the test of time. She would chew 10 or 15 minutes at a time and nap from exhaustion. Overall, several hours of chewing. I must say this toy is not indestructable. In the end it was necessary to remove it and substitute another toy. The bully on the picture looks like a twin of my own pup. I did remove loose slivers and pieces that could be chewed off immediately. I am attaching a pic of the pre-disposal remnants for clarity. This is a tough toy but again, not indestructible.
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Reviewed in the United States on September 8, 2025
★★★★★ 3
Less than 30 min
Color: Blue, Color: Blue
Bought for my 8 month old lab. Dog toy said for aggressive chewers. Wrong! Super cute and feels heavy duty, but not for aggressive chewers.
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Reviewed in the United States on January 14, 2025
★★★★★ 5
Good for aggressive chewers!
Color: Blue
Smelled awful out of the package and it's way heavier that I expected, but it's one of the only toys that my puppy has not shredded to pieces.
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Reviewed in the United States on May 8, 2026
★★★★★ 4
Solid Toy NOT For Small Breeds
Color: Blue, Color: Blue
Bought this for my Pug puppy because he's always chewing on our shoes and dragging them outside and in every which direction. He doesn't really damage them, it's more of just a pain to chase him around and try and actually get the shoe from him because he thinks we're playing. So, I looked on Amazon for a shoe toy and found this. It has a decent rating of 4.2 stars currently and it looks pretty sturdy. Well, when I got it, I realized that it's VERY sturdy. In fact, it's too sturdy; at least for a smaller breed like a pug. I know in the title is says for medium to large dogs, but when I looked at the demensions I thought it would be fine for him. He played with it for a few minutes, but it's just too big and VERY heavy for him. I was actually surprised how heavy it was. So, I decided to weigh it on a scale I have and it came out to 0.83 pounds. I actually thought it would read heavier than that (at least a pound), but that's what the scale said and I did it twice to be sure. So, if you have a small dog like a Pug, I wouldn't recommend this. Definitely a great toy for a German Shepherd or something in that category because of how heavy and thick it is. I'm guessing, even with a large breed of dog, this toy is probably going to last a long time. There's also a hole in the top where you can put peanut butter (or some kind if dog friendly treat) inside, which is really cool. I tried that with him as well, but he just wasn't interested. He's more into the Kong plushies. Anyway, in all, it's a pretty good product. Just not for a small breed dog. I'm giving it 4 stars. As you can see from the photos I uploaded, it's a rather small toy, but it's very solid and chunky. I also took a few pictures with a Pilot G2 pen next to it to better judge the size. Would buy from this seller again though if they had other toys for smaller breed dogs. Thank you.
💟 Sarah 💟
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Reviewed in the United States on March 2, 2026