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Ships within 48 hours · Estimated delivery Jul 21 - Jul 26
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Description
Dinan Free Flow Axle-Back Exhaust for 2016-2020 BMW 340i/440i D660-0055Dinan Free Flow Axle Back Exhaust 2016 2020 BMW 340i 440i Dinan engineers designed the F30 340i and F32 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
Dinan Free Flow Axle-Back Exhaust - 2016-2020 BMW 340i/440i
Dinan engineers designed the F30 340i and F32 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 |
|---|---|---|---|
| 2016-2018 | BMW | 340i | Base |
| 2016-2018 | BMW | 340i xDrive | Base |
| 2017-2020 | BMW | 440i | Base |
| 2017-2020 | BMW | 440i xDrive | 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
4.1 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Comfortable Flip-Flops with a Clean, Sporty Look
Size: 13, Color: Black/Geyser
I picked up the Columbia Men’s PFG Castback Flip in the black and white colorway, and the first thing I noticed was how comfortable they felt right out of the box.
How They’ve Been Used:
Even though it’s still winter, I’ve been wearing them around the house occasionally to get a feel for the fit and comfort. I plan to use them more regularly outdoors once the weather warms up.
What Worked Well:
Immediate Comfort: The footbed feels cushioned and supportive without needing a break-in period.
Secure Fit: The straps sit comfortably without rubbing or feeling stiff.
Lightweight Design: Easy to slip on and off for quick wear.
Clean Style: The black and white combination gives them a sharp, versatile look.
Positive Feedback: My wife has already commented on how good they look.
Things to Keep in Mind:
Seasonal Use: Best suited for warmer weather and casual settings.
Sizing: Checking the size guide helps ensure the right fit.
Bottom Line:
Based on my experience so far, these flip-flops offer a great balance of comfort and style. They’re comfortable enough for everyday wear and look sharp enough for casual outings. I’m looking forward to putting them to full use once spring arrives.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 27, 2026
★★★★★ 5
Columbia always makes great stuff
Size: 14, Color: Espresso II/Black
Even with my flat feet these offer a lot of padding which makes these extremely comfortable. They increase my height about an inch haha. These are great for walking around the beach or just going for walks. The tread on the bottom of these make walking up hills where the surfaces are not completely even extremely easy and very grippy. Time will tell how durable these are, but so far they're holding up very well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
★★★★★ 5
Comfortable Lightweight Flip Flops with Reliable Grip
Size: 9, Color: Black/Geyser, Size: 9, Color: Black/Geyser
These flip flops have an excellent fit with a cushioned footbed that makes them very comfortable to wear for long periods. The grip is strong on wet surfaces, which adds confidence when walking around pools, beaches, or after rain. The overall quality feels top tier, and the color looks clean and well finished. They are lightweight, and the sizing was spot on, making them easy to slip on and wear throughout the day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 5
Comfortable, Lightweight, and Easy for Everyday Wear
Size: 8, Color: Black/Geyser
I picked these up mainly for casual wear and beach days, and they’ve honestly been a great grab. They were comfortable right out of the box, which isn’t always the case with flip flops. The footbed has a little bit of cushion without feeling overly soft or flimsy. They feel supportive enough for running quick errands but still light and easy to slide on.
The fit was true to size for me. They’re maybe slightly roomy in the toe area, but not in a way that bothers me. The straps don’t rub or dig in, which is usually my biggest concern with sandals like this.
They also seem well made. The material feels durable and not cheap, and they have that simple Columbia look that works with shorts or just something casual around the house.
Overall, solid pair of flips. Nothing flashy, just comfortable and reliable. I’d definitely buy them again.
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Reviewed in the United States on February 19, 2026
★★★★★ 5
Great, durable toy
Color: Blue-Red, Size: Extra Large Size 5 (9")
I’ve had this toy for a while now and my dog absolutely loves it. I frequently bring it to the dog park with us and it’s also loved by other dogs. The ball is pretty durable. My dog is not a big chewer but other dogs that play and chew on it haven’t been able to pierce it yet. The handles are sturdy and also still intact. Overall a little pricey but in my opinion worth it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
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