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CSF Radiators


CSF Intercooler set for Audi C8 RS6

CSF’s strategic partnership with PWR brings F1 cooling design and technology to the high-performance aftermarket. These intercoolers help to keep charge temperatures consistently lower than the factory intercooler. This is because your factory intercooler was designed for standard power levels and expected type of use, as soon as you go outside of the factory power levels and expected type of use, your factory intercooler will begin to struggle. As well as this, as your intercooler goes through its life the core will deteriorate externally as well as fill with contaminates internally which results in a reduction in its performance.  

Over time the factory plastic end-tanks which are crimped onto the factory core can leak, losing precious boost pressure resulting in a significant lack of performance and risk to the engine. 

However, not all intercoolers are made equal. 

CSF Core design - Rolled Tube & Billet End Tanks

The CSF intercooler for the C8 RS6 is a larger, more efficient intercooler for significantly improved cooling power. 

PWRs rolled tube cores are optimised in PWRs in-house wind tunnel, through this process PWR select the optimum stack height and multi-louvred fin design for both the ambient and pressure sides for optimum balance between cooling power and pressure drop.

Number of tubes
22 45
Tube height  7mm 3mm
Fin height 7mm 4.85mm 
End-tanks to core connection Core crimped onto plastic end-tank with gasket Core and end-tank TIG-welded  



  • Eliminates heat soak 
  • Lowers charge air temperatures
  • Eliminates end-tank failure at elevates boost levels 
  • VF Engineering saw ≈ +20 whp + 18wtq increase on a stage 1 tune
  • VF Engineering saw ≈ +10 whp + 20tq increase on a stage 2 tune


  • Formula-1 Performance Grade Core by PWR (2-Row Core Featuring Rolled Tubes w/ Inner Fins)
  • 45 Tubes vs. OEM 22
  • 3mm Rolled Tube vs. OEM 7mm
  • 4.85mm Fin Height vs. OEM 7mm
  • CNC Machined Billet End Tanks
  • 100% TIG-Welded vs. OEM Style Gasket and Crimped Plastic End Tanks for Maximum Durability in High Boost Applications
  • OEM Style CNC Machined Inlet/Outlet Connections for Precise Fitment with All OEM Components
  • Highly Engineered, Lightweight Design 
  • True Plug-and-Play “Drop-in Fit” Installation
  • Made in the USA at PWR North America

CSF Manufacturing, Testing & Finish

These intercoolers are manufactured PWRs North American factory, this means PWR has total control over our production, unlike other white-label brands. PWR’s intercoolers start life in their factory as an aluminium sheet or bar and from there they create their own rolled tubes, multi-louvred fins, CNC machine all of the fittings. The core is then CAB brazed in their state of the art clean room and the end-tanks and fittings TIG welded together by their master welders. 

All of PWR’s intercoolers are individually leak tested and go through a fitment inspection to ensure critical dimensions are per our design. 

To finish our intercoolers are only available in a raw finish.

OEM part number: 4K0 145 805 P (Left) & 4K0 145 806 B (Right)

Compatible models: 2020+ Audi C8 RS6/RS7