CSF has developed the ultimate performance cooling radiator for the BMW E39 with trusted R&D partner and BMW specialists RK Autowerks. They have continued development and now produce an add-on oil cooler which includes a direct-fit thermostat, inline with the system and custom fittings going to -10AN lines. 

See More on Their E39 M5 Oil Cooler >

High-Performance Radiator

CSF #7064 – MSRP/MAP $549 USD
  • 95-03 BMW 540i (E39) (Manual Transmission)
  • 98-03 BMW M5 (E39) (Manual Transmission)
  • 2-Row 42mm Core (Dual Core) Featuring CSF’s Exclusive B-Tube Technology
  • Core Features an Ultra-Efficient Fin with 6.5mm Fin Height and Multi-Louvered Design for Maximum Surface Area Contact
  • CNC Machined “Quick-Connect” Inlet/Outlet Connections 
  • CNC Machined Brackets and Fittings for Superb Fit and Durability
  • All-Aluminum Race Style Drain Plug
  • 1-Hour “Mirror Finish” Hand Polish
  • “Drop-in Fit” Requiring No Modifications to Install – Accepts All Attaching OEM Components Including “Quick Connect” Hoses, AC Condenser, Mounting Brackets and Fan Shroud
  • Fits: 95-03 BMW 540i (E39) & 98-03 BMW M5 (E39)

All-Aluminum Dual-Pass Race-Spec Oil Cooler Kit (CSF #8032 + RK Autowerks Kit)

CSF #8032 – MSRP $1,299 USD
  • Designed, Developed, and Track Proven
  • Replaces OEM Unit Single-Pass Design and Plastic Shroud with a Unique Top/Bottom Dual-Pass Design for Maximum Surface Area and Flow
  • “Drop-in Fit” Requiring No Modifications to Install
  • Fully TIG-Welded Extruded-Endtank Design vs. OEM Mechanically Jointed and Tack-Welded Design for Superior Reliability & Durability
  • Fits Precisely with the Contour of the OEM Bumper – No Issues with Aftermarket Splitter Attachment
  • Turbulated Heavy-Duty Bar/Plate Design Makes for the Most Reliable & Durable Oil Cooler Available for the Platform
  • 8 Rows of Maximum Cooling with a High Density Multi-Louvered Fin Pitch Design
  • Oil Cooler will Only Mount onto CSF’s All-Aluminum Triple-Pass Radiator (CSF #7064) – Will NOT Mount to the OEM Radiator
  • RK Autowerks Kit Includes:
    Plumbing: This is a direct-fit oil cooler for use with existing OEM lines using RK Autowerks custom fittings and -10AN lines 
  • Thermostat: There is a direct-fit thermostat inline with the system to bypass the oil until the oil is up to temperature
  • Motorsport Silver Finish
  • OEM #: 17212228942