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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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Description
Fits 2016-2021 Bmw 230I/M240I High Performance Heat Exchanger-D780-0002The factory B4x B58 heat exchanger is not built to cater to the rigorous demands often associated with a modified build. The thin core is easily overwhelmed with IAT's rising dramatically once pushed beyond a few successive WOT pulls or even a few minutes at the track. This elevation in temperature gives way to the factory ECU fail safes pulling timing and reducing overall power in order to keep the system from overheating to the point of permanent
The factory B4x/B58 heat exchanger is not built to cater to the rigorous demands often associated with a modified build. The thin core is easily overwhelmed with IAT's rising dramatically once pushed beyond a few successive WOT pulls or even a few minutes at the track. This elevation in temperature gives way to the factory ECU fail safes pulling timing and reducing overall power in order to keep the system from overheating to the point of permanent damage. On an application where enjoyment is directly attributed to pushing the platform to its limits this constraint to cooling presents a challenge for the automotive enthusiast. The Dinan B4x/B58 heat exchanger for the F2x/F3x chassis assists in mitigating these issues with a more robust core (48mm thick Dinan core vs. 27mm thick OEM core) that wields 78% more heat transfer surface area for improved cooling capacity. The significant increase in core thickness requires unique "L" shaped end tanks to be incorporated as well, which also contributes to the overall thermal mass (ability to absorb, store, and release heat) improvement beyond the OEM setup. With up to a 15° IAT delta recorded over stock the Dinan heat exchanger is ready, and able, to assist in extending your vehicles ability to deliver maximum performance time and time again for your driving enjoyment!
Features:
- Average of 8° reduction in IAT's with a maximum reduction of 15° over 15 successive WOT pulls
- Reduces the tendency to heat soak / go in to limp mode
- 48mm thick Dinan cooler vs. 27mm thick stock cooler
- 78% more cooling surface area and volume than stock
- 100% TIG welded and pressure tested
- Installation hardware included (inclusive of xDrive specific transmission oil cooler brackets)
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 2425 reviews
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Product Reviews
★★★★★ 5
Divider
Color: Beige, Size: 4-panel
Looove this so much. No assembly needed just opened the box and it was ready. The quality feels okay, pretty sturdy and does its job. It’s very versatile i use it as a backdrop or a divider. It’s stable and a good value
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Elegant with subtle tones
Color: Beige, Size: 5-panel
Well made, and rather elegant. It has more subtle tones in the weave than the picture can depict. Nice and lightweight so they are easy to move. Very lovely.
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Reviewed in the United States on December 23, 2025
★★★★★ 5
Pretty and useful
Color: Beige, Size: 6-panel
Bought this room divider as an alternative to installing a balcony shade and I'm so happy with it. It comes assembled and it's light to carry but stands firm once its placed. The bamboo material is a little sheer so the color gives the balcony a boho vibe. Very pretty way to block the sun and get some privacy.
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Reviewed in the United States on November 9, 2025
★★★★★ 5
Most beautiful high quality screens ! Sellers are great too! I finally found the perfect screen!!!
Color: Beige, Size: 4-panel
These screens are absolutely beautiful! If your searching for high quality here is your screen!!
We bought 4 of them already and would buy more. They have zero odor!! No smell!!! We could use them right out of the box!!
The sellers are wonderful to work with. Very kind and generous.We highly recommend them!
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Reviewed in the United States on March 19, 2026
★★★★★ 5
Works very well, and good-looking
Color: Beige, Size: 6-panel
This is attractive and sturdy, and tall enough that my cat cannot get over it as long as there is no furniture nearby that she can launch herself from, which is why I got it. The bamboo is tightly woven, she can't get her nails into it. I installed some brass drawer pulls in strategic places so I can grab them to move the folding screens in different positions, depending on where I don't want my cat to go. So it gets moved around, dragged around, constantly and still looks in mint condition after almost 3 years of constant use. I highly recommend. The lightest version is very attractive.
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Reviewed in the United States on August 18, 2025