CSF Porsche 911 Turbo/Turbo S Intercooler Set (992)CSF Core design Rolled Tube & Billet End Tanks The CSF intercooler for PORSCHE 992 Turbo & Turbo S 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. CAD optimised end