DO88 Charge Cooler Manifold, BMW G-Serie (B58) Gen 2

To Fit:

• BMW 2' M240i M240iX (G42) - Engine: B58 Gen2 - 2021 on
• BMW 3' M340i M340iX (G20 G21) - Engine: B58 Gen2 - 2018 on
• BMW 4' M440i M440iX (G22 G23 G26) - Engine: B58 Gen2 - 2021 on
• BMW 5' 540i 540iX (G30 G31) - Engine: B58 Gen2 - 2018 on
• BMW 6' 640i 640iX (G32) - Engine: B58 Gen2 - 2018 on
• BMW 7' 740i 745e (G11 G12) - Engine: B58 Gen2 - 2018 on
• BMW 8' 840i 840iX (G11 G12) - Engine: B58 Gen2 - 2018 on
• BMW X3 M40iX (G01) - Engine: B58 Gen2 - 2018 on
• BMW X4 M40iX (G02) - Engine: B58 Gen2 - 2018 on
• BMW X5 40iX (G05) - Engine: B58 Gen2 - 2017 on
• BMW X6 40iX (G06) - Engine: B58 Gen2 - 2018 on
• BMW X7 40iX (G07) - Engine: B58 Gen2 - 2017 on
• BMW Z4 M40i (G29) - Engine: B58 Gen2 - 2017 on

Enhance your B58 engine's performance with the do88 Charge Cooler Manifold!

Background
The B58 engine, introduced with the F-series a few years back, has proven to be a real gem of an engine, capable of high outputs with great character. However, there are a few weak points that need addressing, both for performance and reliability. The B58 comes equipped with a water-to-air charge cooler that is coupled a with front-positioned heat exchanger (water radiator). The heat exchanger serves to cool the water circulating through the charge air cooler, which in turn helps dissipate heat from the charge air before it enters the engine. The charge air cooler is integrated into the intake manifold on the B58, making it an intricate and dense construction, demanding accuracy in the design and execution by us as an aftermarket producer.

Challenges with the factory components
Owners of tuned B58 engines often confront the issue of rapid heat soak in the charge air cooling system, particularly when the vehicle is used for track days. Elevated intake air temperatures may prompt the ECU to decrease the power output, or even switch the car into limp-home mode. Regular spirited street driving can also cause similar issues.

Additionally, the factory installed direct injection system, with its obvious benefits, is not well suited for high horsepower applications or ethanol flex fuel usage. To be able to inject more fuel, many turn to installing port fuel injector spacers between the intake manifold and the cylinder head. The downside with this solution is that it positions the injectors in a funny angle. As a result, the fuel hits the walls of the intake runners, leading to potential fuel puddling.

As is often the case, factory components can become limiting factors when you strive for high power levels, particularly in terms of airflow. The factory (OE) intake manifold is such a component, that not only restricts airflow but also poses a significant risk of cracking under high boost levels, due to its plastic construction.

The do88 solution

Bar&Plate core
Our manifold features a Bar&Plate design air-water core, which incorporates densely stacked cooling fins, offering great heat transfer. The core is precisely 102 mm (4 inches) thick, maximising its effectiveness for this specific application. Both the air and water fins´ characteristics have undergone careful evaluation to achieve the ideal balance between optimal cooling and airflow.

Innovatively designed cast end tanks
The charge air and cooling water are evenly distributed across the core through carefully designed, cast end tanks. The development of these end tanks ...