do88 BMW B58 Gen 2 (M240I/M340I/M440I/Supra) Transmission Cooler

do88's engineers redesigned the transmission cooler's core specifically to address the heat especially on track driven cars, increasing core volume by a substantial 184% and active cooling area by 176% compared to the original cooler, while maintaining similar fluid pressures. Harmonica tubes with internal channels ensure optimal oil flow and maximum surface area contact for genuinely efficient heat transfer. This is a drop-in fit, eliminating the need for modifications, using OEM-style quick-connect inlet/outlet connections.

Works with: OEM-style quick-connect connections. Compatible with do88's Front Intercooler Radiator (WC-400) for a complete cooling system upgrade.

Why Choose This Transmission Cooler

• 184% larger core volume than the factory unit
• 176% more active cooling area
• Harmonica tubes with internal channels for optimal oil flow and surface contact
• Maintains similar fluid pressures to stock despite the substantial capacity increase
• Genuine drop-in fit, no modifications required
• Compatible with do88's Front Intercooler Radiator for a complete system upgrade

Compatibility

• Toyota GR Supra MK5 (A90/A91, 2020+, B58)
• BMW G42 M240i/M240iX (B58, 2022+)
• BMW G20/G21 330e (B48X, 2018+)
• BMW G20/G21 M340i/M340iX (B58, 2018+)
• BMW G22/G23/G26 M440i/M440iX (B58, 2021+)
• BMW G29 Z4 M40i (B58, 2018+)