CSFSKU: B58R-COO-005
CSF #8355 High-Performance Auxiliary Radiator - F2X M240i / F3X 340i 440i / F87
$389.00 Available
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: Gen 1 B58 (2016-2019 F-series: M140i, M240i, 340i, 440i, 540i, 740i, X3/X4 M40i)
1
- Free US shipping over $250
- 30-day returns on unused parts
- Fitment help before you buy
Drop-in 2-row 42mm aux radiator for Gen1 B58
Brand: CSF · Part #: 8355
Requires: Professional install
Gen 1 B58 (2016-2019 F-series: M140i, M240i, 340i, 440i, 540i, 740i, X3/X4 M40i)
| Model | Chassis | Years | Engine | Fits |
|---|---|---|---|---|
| M140i | F20/F21 | 2016–2019 | Gen 1 B58 | |
| M240i | F22/F23 | 2016–2021 | Gen 1 B58 | |
| 340i | F30/F31/F34 | 2016–2019 | Gen 1 B58 | |
| 440i | F32/F33/F36 | 2017–2020 | Gen 1 B58 | |
| 540i | G30/G31 | 2017–2019 | Gen 1 B58 | |
| 740i | G11/G12 | 2016–2019 | Gen 1 B58 | |
| X3 M40i | G01 | 2018–2019 | Gen 1 B58 | |
| M340i | G20/G21 | 2019+ | Gen 2 B58 (TU) | |
| M440i | G22/G23/G26 | 2021+ | Gen 2 B58 (TU) | |
| M240i | G42 | 2022+ | Gen 2 B58 (TU) | |
| Z4 M40i | G29 | 2019+ | Gen 2 B58 (TU) | |
| GR Supra 3.0 | A90/A91 | 2020+ | Gen 2 B58 (TU) | |
| 540i | G30/G31 | 2020–2023 | Gen 2 B58 (TU) | |
| 740i | G11/G12 | 2020–2022 | Gen 2 B58 (TU) | |
| X3 M40i | G01 | 2020+ | Gen 2 B58 (TU) |
Not sure? Email sales@b58racing.com with your VIN.
- Orders ship from Dallas, TX in 1–2 business days.
- Free US shipping on orders over $250.
- Unused parts can be returned within 30 days. Some items are marked no-refund in their description.
Full details are on our shipping and returns page.
Pairs well with
Bremmen Parts
Bremmen Parts Thermostat - B58A (Gen1)
Fits: M140i, M240i, 340i, 440i
$292.63Ships in 3–7 days
Mishimoto
Mishimoto Performance Aluminum Radiator Kit w/ Auxiliary Radiators - 2020+ GR
Fits: GR Supra 3.0
$1,303.95Ships in 3–7 days
Mishimoto
Mishimoto Automatic Transmission Cooler - 2020+ GR Supra 3.0
Fits: GR Supra 3.0
$582.95Ships in 3–7 days
INA (OEM)
OEM Thermostat / Heat Management Module - B58C/B58D (INA-Schaeffler)
Fits: M340i, M440i, M240i, Z4 M40i & more
$229.99Ships in 3–7 days