Rvng G series B46/B48/B58 Gen 2/3/Supra Upgraded Heat Exchanger

Check chassis/model compatibility at the bottom of this description.

Compatible with B46, B48, and B58 engines.

RVNG RaceWorks Why Upgrading the B58 Cooling System Is Essential?

The 2nd and 3rd generation B58 cooling layout has one major weakness: the factory liquid-to-air charge-air cooler becomes overwhelmed fast. Once the coolant in the charge-air system heat-soaks, intake air temperatures climb rapidly, and the ECU responds by pulling power. Push the car a little harder, and it eventually falls straight into limp mode.

This isn’t just something people talk about online it’s a real limitation we’ve seen again and again. At competitive track events, especially in warm weather, modified B58 cars struggle to make more than a couple of laps without temperatures skyrocketing. Drivers are forced into cooldown laps, early pit stops, or resorting to spraying their heat exchangers with water just to get temps back under control.

For anyone increasing boost, upgrading the turbo, or pushing the car beyond stock power levels, the factory single-row heat exchanger simply isn’t designed to keep up. The OEM unit is only 25 mm thick and has limited coolant capacity, which means it saturates quickly and cannot shed heat efficiently during repeated pulls or extended track sessions.

RVNG’s high-efficiency heat exchanger solves this by stepping up to a massive 68 mm dual-row core over 2.5× the thickness and dramatically more coolant volume and surface area. Our optimized core geometry increases heat transfer, reduces pressure drop, and delivers stable IATs even when the car is pushed hard.

Built for a straightforward installation, the housing and tank profile is designed to sit neatly within the factory OEM location while maintaining a clean, performance-focused finish. Billet transmission cooler mounts and a full metal debris guard add durability without restricting essential airflow, making this setup a strong choice for enthusiasts exploring car modification ideas and premium components from trusted aftermarket car brands.

See more about RVNG RaceWorks by following us on Instagram, where you can explore custom builds, performance-focused vehicles, product highlights, and inspiration for your next project.

But please keep in mind cutting is required in order to fit this size core.

BMW G-Series Platforms

2019–2022 BMW G20/G21 330i

• 2.0L Turbocharged 4-Cylinder

2019–2022 BMW G20/G21 330i xDrive

• 2.0L Turbocharged 4-Cylinder

2021–2025 BMW G22/G23 430i

• 2.0L Turbocharged 4-Cylinder

2022–2025 BMW G26 430i Gran Coupe

• 2.0L Turbocharged 4-Cylinder

2021–2025 BMW G22/G23 430i xDrive

• 2.0L Turbocharged 4-Cylinder

2022–2025 BMW G26 430i xDrive Gran Coupe

• 2.0L Turbocharged 4-Cylinder

BMW G42 — 2-Series

2023–2025 BMW G42 M240i

• 3.0L Turbocharged Inline-6

2022–2025 BMW G42 M240i xDrive

• 3.0L Turbocharged Inline-6

BMW G20 / G21 — 3-Series (B58)

2020–2025 BMW G20/G21 M340i

• 3.0L Turbocharged Inline-6

2020–2025 BMW G20/G21 M340i xDrive

• 3.0L Turbocharged Inline-6

BMW G22 / G23 / G26 — 4-Series (B58)

2021–2025 BMW G22/G23 M440i

• 3.0L Turbocharged Inline-6

2024–2025 BMW G26 M440i Gran Coupe

• 3.0L Turbocharged Inline-6

2021–2025 BMW G22/G23 M440i xDrive

• 3.0L Turbocharged Inline-6

2022–2025 BMW G26 M440i xDrive Gran Coupe

• 3.0L Turbocharged Inline-6

BMW G29 — Z4 Roadster

2019–2022 BMW G29 Z4 (2.0L)

• Turbocharged 4-Cylinder

2019–2022 BMW G29 Z4 (3.0L)

• Turbocharged Inline-6

Toyota GR Supra — A90 / A91

2024 GR Supra — 45th Anniversary Edition (3.0L)

• Turbocharged Inline-6

2023 GR Supra — A91-MT Edition (3.0L)

• Turbocharged Inline-6

2020–2025 GR Supra (3.0L Models)

• Turbocharged Inline-6

2023–2025 GR Supra Premium (3.0L)

• Turbocharged Inline-6

2024 GR Supra Premium — 45th Anniversary Edition (3.0L)

• Turbocharged Inline-6

2021–2022 GR Supra (2.0L)

• Turbocharged 4-Cylinder

Does not fit the 540i.

Products received may vary slightly from images due to manufacturing tolerances or supply chain variables.