DESCRIPTION
Upgrade engine cooling components with the do88 Aluminum Radiator. WC-400 fits BMW G-Series B46/B48/B58 / Toyota GR Supra MK5 (A90).
Enhance your B58 Gen 2 engine's performance with the do88 Performance Front Mount Heat Exchanger!
B58 engine compared to the F80 M3/M4 S55
The B58 engine shares similarities with the S55 engine found in the F80 M3/M4 models, as both engines have a water-to-air charge cooler paired with heat exchangers (water radiators) in the front of the car. These radiators cool the water flowing through the charge air cooler, which dissipates heat from the charge air before it enters the engine. The main difference lies in the B58's liquid-to-air charge cooler design, which is integrated into the intake manifold, while the F80 S55's cooler is a separate unit mounted on top of the engine.
Challenges of the B58 Charge Air Cooling System
A common issue with tuned B58 engines is the rapid heat soaking of the charge air cooling system, particularly during track days. High intake air temperatures will make the ECU reduce power output or put the car into limp mode. Even spirited street driving can prompt the ECU to pull timing and decrease power output due to high intake temperature.
Our Solution
It is evident that this system needs increased cooling capacity to prevent heat soaking. Part of our solution is the do88 Performance Front Mount Heat Exchanger. The do88 Performance Front Mount Heat Exchanger is designed to provide increased cooling capacity, preventing heat soaking. It features:
- 80% larger core volume than the original radiator (OE).
- Dual-row core that is 48 mm thick, increasing the cooling surface by 36%.
- Quad-pass layout, allowing water to pass through the radiator four times instead of two, maximizing core surface area utilization.
- Slightly higher 5 mm ambient fin height (compared to the OE's 4.4 mm), ensuring good airflow to the engine radiator despite the increased core thickness.
- Full aluminum construction, complete with durable TIG-welded end tanks.
- Increased fluid capacity (2,6 liter more) for optimal heat dissipation.
Installation
Our heat exchanger includes mounting points for the OE transmission cooler and both OE rock guards. Some trimming of the OE plastic radiator mounting frame is necessary to fit the larger do88 Performance Front Mount Heat Exchanger (see installation instructions).
OE Reference Numbers:
17118666811
16400-WAA03
Vehicle Fitment:
Model: Toyota GR Supra MK5 (A90, A91)
Model Years: 2020–
Engine: B58 / B48
Model: BMW 2-Series M240i / M240iX (G42)
Model Years: 2022–
Engine: B58
Model: BMW 3-Series 330i / 330iX (G20, G21)
Model Years: 2018–
Engine: B48 / B46
Miscellaneous: Only suitable for cars with water-cooled intercooler.
Model: BMW 3-Series M340i / M340iX (G20, G21)
Model Years: 2018–
Engine: B58
Model: BMW 4-Series 430i / 430iX (G22, G23, G26)
Model Years: 2021–
Engine: B48 / B46
Miscellaneous: Only suitable for cars with water-cooled intercooler.
Model: BMW 4-Series M440i / M440iX (G22, G23, G26)
Model Years: 2021–
Engine: B58
Model: BMW Z4 20i / 30i (G29)
Model Years: 2018–
Engine: B48 / B46
Miscellaneous: Only suitable for cars with water-cooled intercooler.
Model: BMW Z4 M40i (G29)
Model Years: 2018–
Engine: B58
TECHNICAL DETAILS
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