CSF Direct Fit OEM Replacement Intercooler CUMMINS 6.7L.CSF intercoolers are a complete, full line of intercoolers--with coverage ranging from Audi to Volvo. Several different styles are available, including plastic-aluminum and all-aluminum, with standard tube and fin cores as well as heavy-duty bar and plate cores. CSF OE-replacement intercoolers provide a drop-in fit requiring no modifications. All CSF intercoolers are built to OE specifications, and incorporate the same high-quality and value that CSF has been known for and has represented in the industry for decades.