Transmission Oil Cooler | BMW M240i/M340i/Z4

CSF is the world leader in BMW transmission cooling technology. From its experience starting with the transmission in the BMW F8X M3, M4, and M2 Comp, CSF applied several different features exclusive to its manufacturing technologies. An innovative dual-core design allows for a 240% increase in core volume, resulting in maximum performance and maintaining optimal shifting during extreme racing conditions – from road racing to the drag strip. During R&D, CSF consulted with a network of partners, including leading time attack teams, tuners, and more. Often, the feedback was gearbox fatigue and sluggish shifting with transmission temperatures overheating under prolonged or hard use. CSF has the answer with our industry-leading transmission cooler for the BMW G-Series’ ZF 8HP transmission.

• Innovative Dual-Core Design (Industry Exclusive) vs. OEM Single Core
  • 240% Increase in Core Volume
  • 130% Increase in Fluid Capacity Compared to OEM (CSF 550ml vs. OEM ~240ml)
  • Two 16mm Stacked Cores = 32mm Core Width (44mm Overall Width) vs. OEM 15mm Core Width
  • Rear Cooler: 15 Rows vs. OEM 12 Rows
  • Front Cooler: Additional 12 Rows
• 5.4mm Tall Multi-Louvered Fin vs. OEM 7mm
• Made with CSF’s AC Condenser Technology Using a 1-Row Super-High Pressure 16mm 9-Channel Microtube for Optimal Oil Flow and Maximum Surface Area Contact
• 129mm Overall Height vs. OEM 125mm Allows for Maximum Performance Without Increasing Overall Surface Area or Blocking Airflow to Rest of Cooling System
• Utilizes OEM Top/Bottom Rubber Seals for Optimal Airflow
• OEM Style “Quick Connect” Inlet/Outlet Connections
• Drop-in Fit Requires No Modifications to Install
• Can be Installed With CSF’s High-Performance Heat Exchanger (CSF #8154) or with the OEM Cooling System
• 2-Year Limited Warranty
• Ideal for Road Racing, Drag Racing, and Vehicles With Increased Performance and/or Transmission Tuning
• OEM #: 17219494828 (BMW)