DO88 S58 Intercooler Radiator G8X M2 M3 M4

Upgrade your G8X M-car’s charge air cooling system with the do88 Front Intercooler Radiator – a high-performance, all-aluminium replacement designed to eliminate heat soak and improve reliability under track and spirited road use.

Heat Soak is the S58’s Weak Point

The BMW S58 engine relies on a water-to-air charge cooling system, with a front-mounted water radiator feeding coolant to the intercooler integrated in the inlet manifold. On tuned or hard-driven G8X models, the system is prone to heat soak, resulting in higher intake temps, reduced power, or even limp mode activation.

A True Motorsport Cooling Upgrade

do88’s solution replaces the factory unit with a 2-row, 48mm thick all-aluminium core featuring a Quad-pass flow design — meaning the coolant flows through the radiator four times instead of two. The result? Maximum cooling contact and reliable performance when it matters most.

• 39% larger core volume than OEM

• Quad-pass coolant flow for improved cooling efficiency

• 2-row core with 48mm thickness for high thermal capacity

• 9% increase in active cooling surface area

• Full aluminium construction with TIG-welded end tanks

• CNC-machined hose fittings and ports

• Taller 5mm fin height vs. 4.4mm OEM for better airflow to the main engine radiator

• Adds 1.4 litres of coolant capacity for greater thermal mass

• Includes custom-fit rock guard protection

• Compatible with both manual and automatic G8X M-cars