21351717 Injector Sleeve Cup Kit, Replacement Kit For Mack Diesel Engine

21351717 Injector Sleeve Cup Kit, Replacement Kit For Mack Diesel Engine This OE 21351717 engine injector cup kit is a direct replacement for Mack heavy-duty diesel truck engines. Precision fabricated with premium heat-resistant material, it effectively seals the injector assembly, prevents coolant leakage and pressure loss, maintains stable injector working environment under extreme high temperature, and is a reliable part for engine overhaul with excellent durability and