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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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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
4.8 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Excellent shirt!
Color: Chive, Size: Large
Excellent shirt! Comfortable and looks great! True to size, and light weight.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
★★★★★ 5
The shirts run true to size and are very well made.
Color: Wine Red-polka Dots, Size: 3X-Large
I want the company COOFANDY and the customers who are considering buying these men's wrinkle free men's shirts for casual business wear, to know that the shirts are beautiful. The material is perfect, and they are made exceptionally well! One of the two shirts that I bought for my husband looks great on him. I had to buy one in a size 2x and one in a size 3x due to the reviews on Amazon's website, where so many of the reviewers stated that the size that they bought ran too small, while other reviewers said the shirt runs too large. My husband tried on the 2x, and it fit him perfectly, which was great because he always wears a 2x. The reason that I am returning them both is that these shirts are tuck-in shirts, and my husband only wears shirts that do not have to be tucked in, such as straight-bottom shirts. I showed him the picture of the shirt in the ad to prove that the models wore them out, not tucked in, but he said the style is wrong for wearing this shirt on the outside, and that he would not be able to wear it. I am so sorry, but I had to return them as he would not ever wear them. But I wanted you, COOFANDY, and your customers to know that the shirts are well worth the money and are just beautiful!
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Perfect fit for my husband
Color: Army Green, Size: Large
Very thick but it's cool, comfortable, no shrinking when washed and no fading. Love this color and the quality of material for the price is top of the line. I will be ordering other colors. My husband really enjoys wearing this and it fits perfectly. Thank you for the excellent work.
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Reviewed in the United States on May 3, 2026
★★★★★ 4
Stylish, Well-Made Shirt—Just Might Need a Touch of Ironing
Color: Black-square, Size: 3X-Large
Why did you pick this product vs others?:
My husband is a big fan of this shirt brand—they offer a great selection of styles, patterns, and fabrics, and the availability of a 3XL is a major win since it’s not easy to find that size. This particular shirt has a classy, lightweight feel with a subtle checkerboard texture that adds visual interest under the light.
The fit is modern and breathable, perfect for summer wear. After washing it straight out of the package, the wrinkles from shipping didn’t fall out, so I wouldn’t call it truly wrinkle-resistant just yet. I’m hopeful that a single pass with the iron will help set it right.
Overall, the shirt looks fantastic and the quality is impressive, especially for the price. Whether for a casual day or dressed up for an event, it’s a versatile choice—just be prepared to give it a little extra TLC after washing.
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Reviewed in the United States on July 5, 2025
★★★★★ 5
Excellent value for your money
Color: Navy Blue-square, Size: X-Large
Comfortable with a slight stretch to the material. Wrinkles were minimal to nearly none after a day of wear. Material is soft with a nice feel to it. Overall great quality and would definitely recommend!
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Reviewed in the United States on May 26, 2026
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