4376171 | Inframe Rebuild Kit for Cummins ISX 150MM liner APR, New CM570 ISX450 ISX1 / ISX2

The 4376171 Inframe Rebuild Kit is engineered for Cummins ISX engines utilizing the 150mm liner configuration. This premium kit features APR-coated pistons designed to enhance durability, reduce friction, and support extended engine performance under heavy-duty operating conditions. Ideal for fleets, rebuilders, and owner-operators aiming to restore compression, reduce oil consumption, and extend the lifespan of ISX platforms—without removing the engine from the chassis.

All components are manufactured to meet or exceed OEM specifications, and the kit is produced in ISO 9001:2015-certified facilities for consistent quality. Backed by a 2-year, unlimited-mileage warranty (Interstate‑McBee or equivalent brand, depending on supplier).

Kit Contents:

• (6) Piston Kits
  • (6) Top Piston Rings
  • (6) Compression Piston Rings
  • (6) Oil Piston Rings
• (6) Engine Piston Assemblies
• (12) Retaining Rings
• (6) Piston Pins
• (6) Piston Ring Sets
• (6) Cylinder Liner Kits
• (6) Cylinder Liners
• (6) Carbon Scraper Rings
• (6) Liner Seals
• (6) Liner Shims
• (6) ISX Connecting Rod Bearings
• (1) Main Bearing Set
• (7) Main Bearings (Pair)
• (2) Thrust Washers (Pair)
• (1) O-Ring Seal
• (1) Bypass Valve Plunger
• (1) Oil Pan Gasket
• (1) Upper Engine Gasket Set
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) Electronic Control Module
• (1) Thermostat Housing Cover Gasket
• (1) Thermostat Housing Gasket
• (1) Turbocharger Gasket
• (8) Cavity Plugs
• (1) Camshaft Cover Seal
• (1) Camshaft Cover Seal
• (6) O-Ring Seals
• (1) Exhaust Manifold Gasket
• (4) Exhaust Manifold Gaskets
• (1) Exhaust Manifold Gasket
• (1) Rectangular Strip Seal
• (1) Fuel Control Housing Gasket
• (6) O-Ring Seals
• (6) O-Ring Seals
• (6) O-Ring Seals
• (1) Cylinder Head ISX Gasket
• (1) Flange Gasket
• (6) O-Ring Seals
• (6) Injector O-Ring Seals
• (1) Grommet Seal
• (1) Connection Gasket
• (1) Camshaft Cover Gasket
• (1) Camshaft Cover Gasket

Warranty: 2-Year Parts and Labor Warranty