
Mishimoto Performance Aluminum Heat Exchanger - A90 Supra / G20
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: Gen 2 B58 (2019+ BMW G-series) and Toyota GR Supra A90/A91
- Shipping at real carrier rates
- 30-day returns on unused parts
- Fitment help before you buy
The B58 cools its charge air with water, and the heat exchanger up front is what pulls heat out of that water. Mishimoto's all-aluminum unit has a bigger core than the factory part, which helps keep intake air temperatures steadier when the car is worked hard.
What you get
- 31% more core volume and 48% more fin area than stock, in a dual-pass core with louvered fins.
- Lower, steadier intake temperatures. Mishimoto reports 5 to 7°F lower intake air temperatures than stock in back-to-back dyno pulls.
- Full aluminum, TIG-welded build. The factory plastic end tanks and ports are gone, and strutted tubes help the core resist bowing.
- Stone guard included to protect the core.
- Mishimoto Lifetime Limited Warranty.
Good to know
- The factory transmission cooler mounting tabs have to be removed. New tabs come with the heat exchanger.
Brand: Mishimoto · Part #: MMHE-SUP-20
Gen 2 B58 (2019+ BMW G-series) and Toyota GR Supra A90/A91
| 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 | |
| X4 M40i | G02 | 2019 | Gen 1 B58 | |
| 640i GT | G32 | 2018–2019 | Gen 1 B58 | |
| M340i | G20/G21 | 2019–2024 | Gen 2 B58 (TU) | |
| M440i | G22/G23/G26 | 2021–2024 | Gen 2 B58 (TU) | |
| M240i | G42 | 2022–2024 | 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) | |
| X4 M40i | G02 | 2020+ | Gen 2 B58 (TU) | |
| X5 xDrive40i | G05 | 2019–2023 | Gen 2 B58 (TU) | |
| X6 xDrive40i | G06 | 2020–2023 | Gen 2 B58 (TU) | |
| X7 xDrive40i | G07 | 2019–2022 | Gen 2 B58 (TU) | |
| 840i | G14/G15/G16 | 2019+ | Gen 2 B58 (TU) | |
| INEOS Grenadier | Station Wagon/Quartermaster | 2023+ | Gen 2 B58 (TU) | |
| M340i | G20/G21 | 2025+ | Gen 3 B58 (48V) | |
| M440i | G22/G23/G26 | 2025+ | Gen 3 B58 (48V) | |
| M240i | G42 | 2025+ | Gen 3 B58 (48V) |
Not sure? Email sales@b58racing.com with your VIN.
- Ships from the brand or distributor, usually in 3–7 business days.
- Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
- 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.
Guides for this part
B58 Intercooler Install: Heat Exchanger Upgrade for Gen 1 F-Series, Gen 2 G-Series and the GR Supra
Every B58 uses an air-to-water intercooler. That includes the Gen 1 F-series BMWs, the Gen 2 G-series BMWs and the GR Supra. The intercooler itself sits inside the intake manifold, and a small radiator up front, called t
B58 Charge Pipe Install: Gen 1 F-Chassis vs Gen 2 G-Chassis and the GR Supra
The B58 charge pipe runs from the turbo outlet to the throttle body. Swapping it is a top-side job on most cars: pull the intake, unclip the pipe from the turbo, unbolt it from the throttle body, move the sensors and O-r
Best A90 Supra Mods, In the Order to Do Them (GR Supra 3.0)
Tune it first. On a GR Supra 3.0, a flash tune or a JB4 is the biggest gain per dollar. Next, add a downpipe and a Stage 2 map, and a better heat exchanger so the car stays strong on hot days. After that comes fuel: flex
Pairs well with

Wagner Tuning EVO1 Intake Manifold w/ Integrated Intercooler - B58.2 Gen2

do88 Aluminum Charge Pipe Kit - B58TU

CTS Turbo Auxiliary Radiator - G20/G29/A90 (x2 required)

