CSF's B58 high-performance heat exchanger will be a critical component to keeping your Supra/BMW's charge air cool, and out of limp mode. The upgraded heat exchanger is especially important when upgrading turbos and/or running performance tuning software. The original 2nd Gen B58 heat exchanger is a 1-row unit that is 25mm 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. The CSF improved design, includes billet transmission cooler mounts, and metal rock guard with improved airflow characteristics. CSF is the only company to include a rock guard and incorporate OEM transmission cooler mounting points for a true plug-and-play "drop-in" fit.
This Part Fits:
Year
Make
Model
Submodel
2019-2025
BMW
330i
Base
2019-2025
BMW
330i xDrive
Base
2021-2026
BMW
430i
Base
2022-2025
BMW
430i Gran Coupe
Base
2021-2026
BMW
430i xDrive
Base
2023,2025
BMW
430i xDrive Gran Coupe
Base
2023-2025
BMW
M240i
Base
2022-2025
BMW
M240i xDrive
Base
2020-2025
BMW
M340i
Base
2020-2025
BMW
M340i xDrive
Base
2021-2026
BMW
M440i
Base
2022-2025
BMW
M440i Gran Coupe
Base
2021-2026
BMW
M440i xDrive
Base
2022-2025
BMW
M440i xDrive Gran Coupe
Base
2022-2026
BMW
Z4
M40i
2020
BMW
Z4
M40i First Edition
2020-2021
BMW
Z4
sDrive M40i
2019-2026
BMW
Z4
sDrive30i
2024
Toyota
GR Supra
45th Anniversary Edition
2021-2022
Toyota
GR Supra
A91 Edition
2023
Toyota
GR Supra
A91-MT Edition
2020-2026
Toyota
GR Supra
Base
2020
Toyota
GR Supra
Launch Edition
2026
Toyota
GR Supra
MkV Final Edition
2020-2026
Toyota
GR Supra
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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.