Charge air cooler pipe (left side) from a 2006 Peterbilt 379 extended hood with a CAT C15 Acert engine. Pipe should be compatible across 2004-2007 applications - check fitment with dealer. OEM P/N D66-6202-545056230 F . Pipe has 4" diameter with 45 degree bend - see pictures. Orange coolant hoses are included - may need to be replaced.