CSF BMW F9X M5/M8 Twin Charge-Air-Cooler SetThe CSF Charge Air Coolers boast a nearly 100% larger core size than factory per side. This greatly increases the capacity for heat transfer from the hot charge air from your F9X's Turbos. Custom Designed CSF Liquid To Air Intercooler Core (CFD Analysis and Testing Completed to Ensure Optimal Performance) 100% Increase in Core Volume Per Each Charge Cooler Compared to the OEM Charge Air Coolers 1 Piece Seamless Air Inlet End Tanks with Integrated