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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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Description
Mishimoto Duracore 3.5in to 4in Transition CouplerExperience superior air intake performance with the Mishimoto Duracore 3. 5 inch to 4 inch Transition Coupler. Designed for automotive enthusiasts who demand high quality parts, this coupler offers a reliable and seamless connection between varying intake pipe sizes. Crafted to enhance airflow efficiency, it ensures your engine receives optimal ventilation for improved power and response. Constructed from durable silicone, this coupler combines
Experience superior air intake performance with the Mishimoto Duracore 3.5-inch to 4-inch Transition Coupler. Designed for automotive enthusiasts who demand high-quality parts, this coupler offers a reliable and seamless connection between varying intake pipe sizes. Crafted to enhance airflow efficiency, it ensures your engine receives optimal ventilation for improved power and response.Constructed from durable silicone, this coupler combines flexibility with strength, resisting heat and pressure under extreme driving conditions. Its sleek black finish adds a professional touch to your air intake system while maintaining a robust seal to prevent leaks.
Whether you're upgrading your current setup or building a new high-performance air intake, the Mishimoto Transition Coupler provides the perfect solution. Easy to install and compatible with a range of vehicles, this part meets the high standards expected by motorsport and tuning enthusiasts alike.
Trust in a well-engineered component from Mishimoto, a name synonymous with quality and innovation in automotive performance parts. Enhance your engine's breathing with this essential transition coupler and enjoy noticeable gains in throttle response and overall efficiency.
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
4.4 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 3
Great slippers but disappointing quality.
Size: 7.5-8.5 Women/6-7 Men, Color: Ash, Size: 7.5-8.5 Women/6-7 Men, Color: Ash
Extremely comfortable, attractive slippers but the stitching came loose on both leather trim areas almost immediately. I tried to sew/glue down the stitching (as seen in photo) but it kept unraveling. Disappointing as these slippers are great in every other way (though they do run a bit big...I wear a 9 but ended up with a 7.5-8.5 which fits with a bit of room to spare even with thick socks). I just hope they hold up after my latest attempt to stop the thread from pulling out any more as I do really love wearing them.
Perhaps I just got a bum pair?
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Reviewed in the United States on April 3, 2024
★★★★★ 5
Quality and comfort
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Comfortable and fit well. I got these to replace a very old pair that finally wore out! Warmth is medium (I wear puffer booties for when it's really cold). Quality on these is great!
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Reviewed in the United States on March 9, 2026
★★★★★ 5
Can't go wrong with Acorn for as long as they last!
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Acorn is just a great company all around. I had bought my husband these slippers over 20 years ago. They are still in great shape although the sole has worn in some places. But nothing's coming apart! However, I decided to replace them for him. His foot is 10.5 and they are a little hard to get on right away-of course, after over 20 years of having "worn in" the original pair, anything would feel tight. So I'm not holding this against them. They will relax with use. The only difference is that the original sole was black and these are tan. I think I would prefer the black, but since it's only being worn in the house, no big deal.
My husband has really cold feet and these slippers never fail to warm his feet right up! He said they feel really soft to walk in and like the cushioning. They're not too heavy and fit him great! I have Acorn slippers myself that I've worn every single day in the house and outside to the mailbox too. They last.
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Reviewed in the United States on April 11, 2026
★★★★★ 4
Very warm.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Very warm and comfortable. A little difficult to put on with the collared top.
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Reviewed in the United States on January 19, 2026
★★★★★ 5
You won't be sorry
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Great padding for comfort and terrific warmth. I bought a pair of Acorns 30 years ago and still have them. Updated to a new color and now feel the benefit of newer padding! I used the sizing listed for shoes and like the roominess for thicker sox. Well made and a joy to put on. (Wisconsin)
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Reviewed in the United States on December 25, 2025
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