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Ships within 48 hours · Estimated delivery Jul 26 - Jul 31
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Description
CSF BMW B58/B48 Front Mount Triple-Pass Heat Exchanger w/Rock GuardThe original OEM B58 heat exchanger is a 1 row unit that is 27mm thick. In comparison, CSF has used its industry exclusive world's largest 2 row core (68mm) with CSF's B Tube technology. A unique tank design allows the larger CSF core to still fit into the OEM cooling system housing. Another critical feature of the CSF BMW B58 high performance heat exchanger is its unique triple pass flow design. The water traveling through the upgraded heat exchanger
The original OEM B58 heat exchanger is a 1-row unit that is 27mm thick. In comparison, CSF has used its industry-exclusive world's largest 2-row core (68mm) with CSF's B-Tube technology. A unique tank design allows the larger CSF core to still fit into the OEM cooling system housing. Another critical feature of the CSF BMW B58 high-performance heat exchanger is its unique triple-pass flow design. The water traveling through the upgraded heat exchanger flows through the radiator three times before exiting the cooler and flowing back into the manifold charge cooler. This ensures that the outlet water temperature of the heat exchanger is the absolute lowest it can be. The OEM design, as well as more expensive aftermarket designs, all have single-pass flow structures.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2021 | BMW | 230i | Base |
| 2017-2021 | BMW | 230i xDrive | Base |
| 2016,2018 | BMW | 330e | Base |
| 2017 | BMW | 330e | iPerformance |
| 2017-2018 | BMW | 330i | Base |
| 2017-2018 | BMW | 330i GT xDrive | Base |
| 2017-2019 | BMW | 330i xDrive | Base |
| 2016-2018 | BMW | 340i | Base |
| 2017-2019 | BMW | 340i GT xDrive | Base |
| 2016-2018 | BMW | 340i xDrive | Base |
| 2017-2020 | BMW | 430i | Base |
| 2017-2020 | BMW | 430i xDrive | Base |
| 2017-2020 | BMW | 430i xDrive Gran Coupe | Base |
| 2017-2020 | BMW | 440i | Base |
| 2017-2020 | BMW | 440i Gran Coupe | Base |
| 2017-2020 | BMW | 440i xDrive | Base |
| 2017-2020 | BMW | 440i xDrive Gran Coupe | Base |
| 2017-2021 | BMW | M240i | Base |
| 2017-2021 | BMW | M240i 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 17 reviews
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Product Reviews
★★★★★ 5
Nice, Tough & Comfortable!
Size: 6.5 Wide Big Kid, Color: Black
Bought as an everyday school shoe for my 10 year old son. He likes them a lot and is holding up great through rough boy play, and they still look good after a couple months now.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
Great
Size: 4.5 Big Kid, Color: Pink/Purple
perfect
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Pink and purple perfection
Size: 13 Little Kid, Color: Pink/Purple, Size: 13 Little Kid, Color: Pink/Purple
Fits great and perfect colors for my (not so) little. This is her first pair of "tie" shoes so we're still learning, but the laces are a good length for teaching and practicing. She says they're very comfortable too.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
TTS
Size: 5 Big Kid, Color: White
TTS, comfy
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Reviewed in the United States on November 24, 2025
★★★★★ 5
True to size
Size: 6.5 Big Kid, Color: Navy/Peel
My a likes the fit. Says they’re comfortable, lines the color.
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Reviewed in the United States on January 12, 2026