CSF 2020+ Audi C8 RS6/RS7 High-Performance Intercooler System (OEM PN 4K0 145 805 P / 4K0 145 806 B)The most important feature of the CSF by PWR RS6 RS7 Intercooler System is the Formula 1 grade intercooler core. CSF's strategic relationship with PWR has allowed the inclusion of this core, which is unlike any other available in the performance aftermarket. Featuring two rows of rolled cooling tubes with inner fins, these cores make for the most efficient intercoolers available. Because of this, they are able to eliminate heat soak and lower IATs