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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 272 reviews
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Product Reviews
★★★★★ 5
Great quality and easy to assemble!
Color: Blues, Size: 56 LB, Color: Blues, Size: 56 LB
I’m really happy with this dumbbell set. The stand was very easy to assemble and feels sturdy once put together. The neoprene coating on the weights is comfortable to grip and doesn’t slip, even when your hands get a little sweaty. I also love the colors—they make the set look nice in my workout space. Perfect for home workouts, compact, and easy to move around. Definitely worth it if you’re looking for a practical and stylish weight set!
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Reviewed in the United States on October 3, 2025
★★★★★ 5
Like new after years of use. Made to last.
Color: Multicolor, Size: 146 LB
Sturdy, well made, good feel. I purchased the set 2 years ago and it's still like new!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
★★★★★ 5
Nice weight set for taking strength off to a new start.
Color: Multicolor, Size: 12 LB
Perfect light weight set to use to rebuild my arm strength. Holder is a bonus. Now the weights will be right where I want them
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Happy customer
Color: Black, Size: 32 LB, Color: Black, Size: 32 LB
I recently purchased a set of black dumbbell weights, and I couldn't be happier with my decision!
These dumbbells are solid and built to last. The weight material feels durable, and I can tell they're gonna last. These weights are perfect for all my exercises. They come in a range of sizes, allowing me to easily adjust the weight for different muscle groups. I love the sleek black finish! It not only looks stylish in my home gym but also adds a touch of professionalism to my space. The price point is excellent considering the quality and durability of these dumbbells. I've seen similar products at a much higher price, but these offer the same benefits without breaking the bank. Their design makes them easy to grip, and the smooth texture ensures I can maintain my hold even during the sweatiest workouts. Plus, they're compact and easy to store, making them perfect for home use.
Overall, these dumbbell weights check all the boxes. I highly recommend them to anyone looking to enhance their fitness journey!
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Reviewed in the United States on September 9, 2024
★★★★★ 4
Great Set
Color: Multicolor, Size: 146 LB
This is a great set of dumbbells. I was looking for the weights in this set and I wanted a nice rack to keep them off the floor. So far they feel solid and accurate and are working as expected. The reason for 4 stars and not 5 - The (2) 20 pound dumbbells shipped separate, which was fine...but everything else was in 1 box! That's 106 pounds plus the rack and packaging. The delivery guy struggled and almost dropped it, and then I had to move it from my front door step. How much more could it cost them to ship it in 3 boxes or redistribute it into 2 boxes under 100 pounds? So lucky the box didn't drop and the contents get lost or wrecked.
Otherwise it is a great set!
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Reviewed in the United States on January 18, 2025