These inframe kits are designed for CAT C15 ACERT engines with twin turbos and higher emissions requirements. Popular OEM overhaul kits include 10R9923 and 10R9924, made to fit engine serial number prefixes like MXS, NXS, and BXS. Built for performance and durability, our kits come with anti-polish liners, advanced piston designs, and all the seals and bearings needed for a clean rebuild. Available from AFA, PAI, and Interstate-McBee—trusted names in heavy-duty engine components. Ideal for fleets and owner-operators running 2004–2010 C15 ACERT engines.
