DO88 S58 Transmission Cooler

Improve transmission durability and cooling on track and road with do88’s upgraded transmission cooler – designed to handle the extra heat generated by tuned G8X models without compromising shift speed or gearbox life.

Overheating Risks in Tuned G8X Cars

The ZF 8HP automatic transmission fitted to the G87 M2, G80 M3, and G82 M4 is impressively capable – but like many OEM parts, its cooling system was not designed for extended track use or heavy tuning. With increased power and heat comes greater stress on the transmission cooler. Overheating can cause:

• Slower, less consistent gear changes

• Reduced transmission life

• Limp mode or transmission fault warnings

Designed for Performance

• +71% increased core volume vs. OEM

• +50% increased cooling surface area

• Dual-pass flow for longer fluid residence time

• Upgraded harmonica-style tubes with internal channels for improved oil flow

• Optimised design with no increase in oil pressure

• 42% increase in oil volume (850ml vs 600ml OEM)

Motorsport-Ready Construction

• Full aluminium construction for maximum strength and heat dissipation

• TIG-welded end tanks for long-term reliability

• OEM-style quick-connect fittings for hassle-free installation

• Fits without any vehicle modifications