Race Spec DCT / 6 Speed Transmission Cooler - BMW M3 E9X

The CSF Race-Spec Transmission Cooler is a serious upgrade for E9X M3 owners looking to control transmission temperatures during hard driving, track days, or high-heat conditions. Built using CSF’s proven A/C condenser-style microtube technology, this cooler increases efficiency and surface area while maintaining true OEM-style fitment.

Designed as the world’s first true plug-and-play transmission cooler for the E9X M3 platform, it installs as a drop-in replacement—no cutting, no custom brackets, and no fabrication—while reusing all OEM mounting points, shrouding, and line connections.

Key Features

• Microtube core technology (based on CSF A/C condenser design)
  1-row super-high pressure core, 22mm wide, 11-channel microtube construction

• Dual-pass high-performance layout
  11 cooling tubes vs. OEM 10-tube design

• High-density multi-louvered fins
  Approximately 20% more surface area contact than the factory cooler

• Drop-in fit (no modifications required)
  Retains OEM oil-line connections, mounting brackets, and shroud/ducting

• Lab tested performance
  Reported at ~30% more efficient than the OEM cooler

• True plug-and-play solution
  Designed specifically for the E9X M3 DCT and 6-speed applications

Fitment

• BMW M3 (E90/E92/E93) – DCT and 6-speed manual