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.
| 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) |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
