CSF Triple-Pass Radiator - E9X M3

The CSF Triple-Pass Radiator for the E9X M3 is the ultimate cooling solution for the E9X M3's S65 V8. It takes the factory cooling to another level, especially on DCT and Supercharged applications. We run this, along with all the other CSF coolers, on our E92 M3 and we have NEVER had a single temp warning or CEL due to cooling. Utilizing CSF's exclusive B-Tube technology and 6.5mm multi-louvered fin height, this radiator is as efficient as they come.  

Tripling down on efficiency, the  integrated three-pass flow system guarantees the lowest possible outlet temperatures of any upgraded cooling system available for the platform today. CSF's in-house wind tunnel tests revealed heat rejection results approximately 20% higher than an OEM unit, providing ample cooling even under the hardest driving and extreme temperatures.

  • Two-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
  • Triple-pass flow structure allows the coolant to flow across the core of the radiator three times before exiting, creating the lowest outlet temperatures possible
  • CNC-machined "quick-connect" inlet/outlet connections
  • CNC-machined brackets and fittings for superb fit and durability
  • Light weight - only 12lbs
  • All-aluminum drain plug
  • Hand-polished mirror finish
  • Drop-in fitment, requiring no modifications to install. Accepts all standard attached OEM components including "quick-connect" hoses, AC condenser, mounting brackets, and fan shroud