The Freightliner School Bus, FS-65, and Acterra 1999 through 2007 Aluminum and Plastic Downflow Radiator is a reliable and durable radiator option. It features stainless steel crimp and wrap-around side rail construction, ensuring long-lasting performance. With a 29 5/8 inch core height and 24 1/4 inch core width, this radiator provides efficient cooling for your vehicle. It also includes a 2-inch upper right at 2 1/4 inch inlet and a 2-inch lower left at 1 1/2 inch outlet. Designed for Freightliner School Bus and FS-65 1999-2004 models with Mercedes or Cummins engines, as well as Freightliner Acterra 2003-2007 models with the same engines, this radiator is a perfect fit. OEM and aftermarket numbers include 559191A, 559191, 8000-31, 800031, SRM8031, 437242S, 239191, 238604, CTVTU83624TT, FRE31, TR9191, SCSI239191, TR8604, SCSI238604, BHTB9384, BHT91661, B9384, BHT91662, 238604, BHTB6719, B6719, BHT91653, BHTB9316, B9316, BHTE1688, E1688, BHTD9444, and D9444.