This Charge Air Cooler is designed for Freightliner and Sterling Acterra Model Q and M2 trucks from 2008 to 2013. With a 28 5/8 inch core height, 23 7/8 inch core width, and 2 inch depth, it fits most Freightliner M2 and Sterling Acterra Model Q trucks. The cooler has a 3 inch inlet and outlet and is sold individually. It is compatible with OEM and aftermarket numbers including BHTP4665100, CHS21, BHTP5243001, P5243001, 0130514000, P4665100, A0525424001, FRT18140, FRT18140N, 441294, and 222277. This Charge Air Cooler is a practical and reliable solution for maintaining the performance of your truck's engine.