do88 BMW E46 M3 Auxiliary Oil Cooler

Expand Your Cooling System with Motorsport Precision

The do88 Auxiliary Oil Cooler is designed as the perfect companion to the do88 Performance Radiator (WC-310) for the BMW M3 E46. Developed for motorsport and heavy-duty applications, it provides additional cooling capacity for low-pressure systems such as power steering or gearbox oil – essential for maintaining reliability under extreme use.

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Why Add an Auxiliary Oil Cooler?

Solves Overheating in Secondary Systems

• Ideal for cooling power steering fluid or gearbox oil

• Helps prevent overheating in track, drift, or endurance environments

• Ensures consistent performance and protects against premature wear

Built for Integration with the do88 Radiator

• Mounts directly to the do88 Performance Radiator (WC-310) using the included CNC-machined brackets

• Rubber-lined P-clips and mounting screws supplied for a clean installation

• Compact, efficient core design optimised for secondary cooling needs

Flexible, Motorsport-Grade Connections

• AN6 male connections for simple and secure plumbing

• Requires custom oil lines (not included) to suit your setup

• Versatile design accommodates a wide range of build specifications

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Technical Details

• Core dimensions: 446 x 131 x 26.5 mm

• Total dimensions: 652 x 131 x 202 mm

• AN6 male fittings (x2)

• Weight optimised for motorsport use

• Supplied with mounting hardware (P-clips and screws)

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Applications

• BMW M3 E46 (2000–2006, S54 engine)

• For use with do88 Performance Radiator (WC-310)

• Configurable as a power steering or gearbox oil cooler

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Why Choose do88?

Swedish-engineered and track-proven, do88 products are designed for enthusiasts and racers who demand reliability and performance under the harshest conditions. Every component is CFD-tested, track-validated, and built with uncompromising quality.