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Ships within 48 hours · Estimated delivery Nov 7 - Nov 12
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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
4.4 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
Great Sunscreen
Scent: Pear & Coconut Water
Love that this is a safer version of sunscreen (less chemicals) and it WORKS!!! Good smell, goes on clean and not chalky or white.
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Great for Sun Allergy Rashes!
Scent: Unscented, Scent: Unscented
I have an autoimmune disease called Sjogren’s Disease. With that, for me, comes a sensitivity to the sun in the form of sun allergy rashes. Also with that, I did a deep dive on the best sunscreens and read a lot of reviews on here. I put some of the outer sides of elbows where my sun allergy rashes were when I received it. There was slight sting, but the skin there was already slightly broken. I really love the texture of it, how it feels on my skin and that there's no white cast. It’s moisturizing, too, with no greasiness. Absorbed really well.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
The best mineral sunscreen
Scent: Unscented
I’m so impressed by this sunscreen! I’ve been using mineral sunscreens for years and this blows every other one I’ve tried out of the water. It is silky smooth and applies so easily, absorbs well and doesn’t feel greasy or heavy. It doesn’t leave a white cast but it still protects very well! Of course like any sunscreen it’s only as effective as your usage, so reapplying is paramount. The unscented truly has no smell to it, which is something I appreciate. Using it for the first time, neither myself or my fair kiddos got sunburnt. It’s just all around a fantastic, clean mineral sunscreen and will be my go to from now on!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Wellness Staple for Sensitive Skin
Scent: Pear & Coconut Water, Scent: Pear & Coconut Water
I’m becoming much more intentional about the products I use on and around my body, especially while traveling, and this sunscreen ended up being one of the best things we packed for our girls trip to Mexico. My friend has extremely sensitive skin and typically reacts to a lot of sunscreens, so we wanted something mineral-based, reef safe, and more wellness-conscious overall.
We split one bottle between the two of us over about five days, and honestly it held up really well. It felt lightweight for a mineral sunscreen, blended in better than expected, and didn’t leave our skin feeling greasy or irritated in the heat. Most importantly, neither of us experienced sensitivity issues or breakouts during the trip.
I also appreciated the peace of mind of using something reef safe while spending so much time in the ocean. It’s one of those products that aligns well with a more mindful, health-focused lifestyle without sacrificing effectiveness.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Love the scent
Scent: Tropical Breeze
This sunscreen has such a great scent and is easy to apply with no white cast. Skin doesn't feel clogged or sweaty. Easy to apply and distribute.
Like that it's a zinc oxide sunscreen that is doesn't leave a white cast and has a wonderful tropical scent. Wish it came in SPF 50 or higher.
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Reviewed in the United States on May 28, 2026