These CAT C15 inframe kits are built for single turbo, non-ACERT engines like the legendary 6NZ, 5EK, and 1LW. Common OEM overhaul kit numbers include 10R8501, 10R8502, and 10R8503. Each kit includes forged pistons, precision-fit liners, gaskets, and bearings for a reliable rebuild. Perfect for long hauls and heavy-duty applications, we offer options from AFA, Interstate-McBee, and PAI. Whether you’re doing a full overhaul or preventive maintenance, these kits are built to last. Compatible with 15.2L engines running 16:1 or 17:1 compression.