do88 Transmission Oil Cooler — BMW M3 E90/E92

Fits DKG (DCT dual-clutch) and manual gearboxes on the E9x M3, addressing rising transmission fluid temperature under sustained track use.

Specification

• 217% larger core volume than OEM — 2,208 cm³ vs 696 cm³
• 178% larger active cooling area — 3,456 cm² vs 1,242 cm²
• 18% lower oil temperature in do88's own testing — 74°C vs 90°C
• 110% more oil volume — 6.5dl vs 3.1dl
• 18-row Bar & Plate cell core
• Can be pre-filled before installation — no need to change all system fluid
• Drop-in installation — fits OEM oil lines and brackets, no modification required