CSF Triple Pass Radiator 15+

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We've calibrated nearly 200 forced induction ND MX-5's. The standard cooling system is fairly efficient but when it comes to supporting these huge gains in output, it's just wasn't meant for the additional workload. We're VERY pleased to now offer the CSF product line for the ND platform - It's leading the way in cooling technology with their new unique B-tubing technology provides more surface area and 10% to 15% more cooling efficiency than factory units, and that's only their FIN design. Durable aircraft aluminum materials and high quality craftsmanship ensures higher durability on track. Design supports all radiator components such as fan shrouds and A/C condenser. Perfect upgrade for your street car as well. 


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 aluminum 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 tube 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."

The tubes are made from aircraft grade special clad aluminum and are intricately formed on our high precision 6-stage tubeforming mill. No other aftermarket radiator manufacturer uses this technology. This technology raises the bar and sets the standard for high performance radiator cores.

In testing, our high performance aluminum radiator showed a significant increase in efficiency over the stock unit. This was the major challenge in creating this radiator as the O.E. Porsche part is already very efficient, so much so that even the RSR race cars simply use a modified version of the stock piece. 

Thanks to CSF’s technical innovations like their B-tubing, superior end tank design, and exquisite craftsmanship, we came up with a design that showed it was capable of removing 5,800 Kcal/hour more than the stock unit. This equates to an average 12.8% increase in efficiency.


All CSF radiators undergo a rigorous testing process in their state-of-the-art testing lab. CSF’s procedures and requirements set the bar for cooling system reliability and performance:

  • Individually leak tested
  • Vibration cycle tested
  • Thermal cycle tested
  • Wind tunnel tested for optimal radiator core cooling efficiency
  • Burst pressure and impulse cycle tested 10,000 times for strength
  • Salt spray tested for corrosion protection
  • 10 foot "box drop" test to ensure packaging protection
  • 30 point fitment inspection on critical dimensions to ensure OE fitment with no modifications necessary


  • 15-Current ND MX5 All