Skip to content


E46 M3 CSF All Aluminum Triple Pass Radiator

Shipping calculated at checkout.

Active Autowerke is proud to offer all aluminum CSF Triple Pass Radiators for your E46 M3! Upgrading your E46 radiator will help control water temps on the street or the track!

  • 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
  • Triple-pass flow structure allows the coolant to flow across the core of the radiator 3 times
    before exiting the radiator for lowest outlet temperatures possible
  • 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


Product information


Your cart is currently empty.

Start Shopping

Select options