CSF Race Radiator for 99-03 BMW 320i, 99-06 BMW 323, 99-05 BMW 325, 99-06 BMW 328, 99-05 BMW 330, 

With CSF’s exclusive B-Tube technology and 6.5mm multi-louvered fin height, 1 hour hand polished mirror-finish, CNC machined mounting brackets

True “drop-in-fit” with no modifications necessary

PART NUMBER: CSF #3055

Fits:

• E46 320i
• E46 323
• E46 325
• E46 328
• E46 330

CSF manufactures the most advanced and efficient radiator cores in the industry by using innovative tube and fin technologies with industry leading testing methods to maximize airflow and heat dissipation. These techniques allow CSF to stay ahead of the pack when it comes to radiator technology!

• “B-Tube” technology – Unlike a regular oval shape “O” type radiator tube, CSF uses a specially engineered tube in a shape of a “B”. These “B-tubes” are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminium material (better cooling efficiency) because this design is actually stronger than normal “O” shape tubes that are welded.
  
• The design (inlet in the middle of tube that is seam brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes. You get the efficiency of 2 smaller tubes vs. 1 large tube within the same space criteria. With “B-tubes” you are able to get “dual liquid laminar flow.”
  
• High Efficiency Multi Louvered Fin – CSF uses ultra efficient multi louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.