The Mishimoto automatic transmission cooler is designed for the BMW M340i (G20), Z4 (G29), and Toyota GR Supra 3.0L with the ZF 8HP transmission. This upgrade significantly increases the cooling surface area and helps maintain stable transmission temperatures during intensive use, such as track days or sporty driving. Thanks to the larger cooling volume and optimized internal fin structure, heat dissipation is significantly improved without any significant pressure drop.
Advantages
• Direct fit for G20 / G29 / GR Supra 3.0L
• 162% larger cooling volume compared to OEM
• 412% more external cooling surface
• Internal cooling fins for maximum heat dissipation
• Designed for minimal pressure drop
• Ideal for track use and heavy-duty use
Technical specifications
• Type: Automatic transmission cooler
• Core type: Aluminum tube-and-fin
• Finish: Silver powder coated
• Volume increase: +162%
• External fin area: +412%
• Design: Optimized to maintain system pressure
Compatibility
• BMW M340i G20 3.0L (2019+)
• BMW Z4 G29 3.0L (2019+)
• Toyota GR Supra 3.0L (A90/A91)
Contents
• Mishimoto transmission cooler
• Mounting hardware
Frequently Asked Questions
Is this a direct replacement for the OEM cooler?
Yes, this transmission cooler is designed as a direct-fit upgrade.
Is this upgrade necessary for street use?
Not necessary, but recommended for increased loads or circuit use.
Does this affect the transmission pressure?
No, the design is optimized to minimize pressure loss in the system.
