Description
Maximize the cooling efficiency of your B58 Gen 2 engine with the do88 Performance Auxiliary Radiators. Designed as direct drop-in replacements for the factory auxiliary radiators, this upgrade provides significantly improved cooling performance, ensuring stable engine temperatures during high-performance driving, track days, and spirited street use.
Why Upgrade?
The B58 engine cooling system relies on three front-mounted radiators—one central radiator and two smaller auxiliary radiators positioned in front of each wheel. While effective for stock applications, the factory auxiliary radiators use slim cores and plastic end tanks, which struggle to dissipate heat efficiently in tuned and high-performance applications.
Optimized Cooling Solution
do88 engineers utilized the available space to design a larger and more efficient auxiliary radiator, improving heat dissipation while maintaining compatibility with OEM mounting points and connections:
- Significantly larger core volume than OEM for enhanced cooling capacity.
- 40mm dual-row core thickness for superior heat dissipation.
- Full aluminum construction with TIG-welded end tanks for durability.
- Increased coolant capacity to reduce heat soak.
- Sold as a pair to ensure balanced cooling on both sides of the vehicle.
Effortless Installation
- Direct drop-in fit with CNC-machined mounting brackets.
- OEM-style "Quick Connect" inlet/outlet connections for seamless integration.
- Compatible with OEM rock guards to protect against road debris.
Vehicle Fitment:
Toyota GR Supra MK5 (A90/A91)
- Engine: B58
- Model years: 2020–present
BMW 2 Series (G42) M240i/M240iX
- Engine: B58
- Model years: 2022–present
- Note: Only compatible with vehicles equipped with remote radiator (17118672237) from the factory (M Technology Package, Option Code: 33T).
BMW 3 Series (G20/G21) M340i/M340iX
- Engine: B58
- Model years: 2018–present
- Note: Only compatible with vehicles equipped with remote radiator (17118672237) from the factory (M Technology Package, Option Code: 33T).
BMW 4 Series (G22/G23/G26) M440i/M440iX
- Engine: B58
- Model years: 2021–present
- Note: Only compatible with vehicles equipped with remote radiator (17118672237) from the factory (M Technology Package, Option Code: 33T).
BMW Z4 (G29) M40i
- Engine: B58
- Model years: 2017–present
- Note: Only compatible with vehicles equipped with remote radiator (17118672237) from the factory (M Technology Package, Option Code: 33T).
Upgrade your BMW G-Series or Toyota GR Supra A90 with the do88 Performance Auxiliary Radiators and ensure superior engine cooling under demanding driving conditions.
The standard shipping rate applies to orders within the continental United States. If you intend to place an order outside of the continental US, please reach out to support@x-ph.com for assistance.
