The CSF transmission oil cooler is a high-performance upgrade for the 2020+ Toyota GR Supra (A90/A91) and the B58-powered BMW G2x/G4x — M240i, M340i, M440i, and Z4 M40i — with the ZF8 automatic. Its dual 16mm stacked-tube core delivers roughly 240% more cooling capacity than the OE unit, holding transmission temperatures down during track sessions, spirited driving, and high-load conditions. Direct-fit to the factory location with stock line connections.
| Brand | CSF |
| Type | Transmission oil cooler (performance upgrade) |
| Core | Dual 16mm stacked-tube; ~240% more capacity vs. OE |
| Transmission | ZF8 automatic |
| Fitment | Direct-fit; factory location |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020+ | Toyota | GR Supra | A90 / A91 (automatic) |
| 2020+ | BMW | M340i | incl. xDrive (G20) |
| 2021+ | BMW | M440i | incl. xDrive / Gran Coupe (G22/G26) |
| 2022+ | BMW | M240i | incl. xDrive (G42) |
| 2022+ | BMW | Z4 M40i | (G29) |
