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
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TERMS (REQUIRED)
OFF-ROAD USE POLICY & EMISSIONS COMPLIANCE NOTICE
California Proposition 65 Warning:
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of
California to cause cancer or birth defects or other reproductive harm. For more information, visit
www.P65Warnings.ca.gov.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell,
install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public
roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB),
it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Civil penalties up to $4,819 per violation per vehicle
Possible criminal penalties under the Clean Air Act
Revocation of registration or smog certification by DMV or local authorities
State & Local Regulations:
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local
regulations before purchasing or installing emissions-related products.
Intended Use & Customer Certification:
All performance, racing, or competition parts sold by this company are intended solely for off-road,
closed-course, or competition use on vehicles that are never registered or used on public highways.
Company Policy Statement
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the
use of emission-control defeat devices or any modification that violates the Clean Air Act or state
regulations.