4376177 | Inframe Rebuild Kit for Cummins ISX, QSX 150MM liner SOHC SIGNATURE CM2250 & 2350 Engine

The 4376177 Inframe Rebuild Kit is a comprehensive engine overhaul solution designed specifically for Cummins® ISX and QSX engines equipped with 150mm liners and Single Overhead Camshaft (SOHC) configurations. Compatible with CM2250 and CM2350 platforms, this kit is engineered to restore performance, improve compression, reduce oil consumption, and extend engine life—all without removing the engine from the chassis.

Manufactured in ISO 9001:2015-certified facilities, all components meet or exceed OEM specifications, making this kit ideal for heavy-duty fleets and vocational equipment requiring a cost-effective and durable in-frame rebuild.

Kit Contents:

• (6) Cylinder Liner Kits
• (6) ISX Connecting Rod Bearings
• (1) Main Bearing Set
• (1) O-Ring Seal
• (1) Bypass Valve Plunger
• (1) Oil Pan Gasket
• (6) Piston Kits

• (6) Piston Ring Sets
• (12) Retaining Rings
• (6) Piston Pins
• (6) Engine Piston Assemblies
• (1) Upper Engine Gasket Set

• (1) Thermostat Seal
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) Thermostat Housing Cover Gasket
• (4) Exhaust Manifold Gaskets
• (2) Grommet Seals
• (1) Exhaust Manifold Gasket
• (1) Water Seal
• (5) O-Ring Seals
• (6) Copper XPI Injector Seals
• (2) Sealing Washers
• (1) Thermostat Housing Gasket
• (1) Exhaust Outlet Gasket
• (1) Intake Manifold Gasket
• (2) O-Ring Seals
• (1) Water Seal
• (1) Turbocharger Gasket
• (1) Rectangular Ring Seal
• (1) Electrical Connector Seal
• (1) O-Ring Seal
• (1) Rectangular Strip Seal
• (2) Seal Carriers
• (2) Turbo Hose O-Ring Seals
• (1) O-Ring Seal
• (1) O-Ring Seal
• (1) O-Ring Seal
• (16) Sealing Washers
• (2) Sealing Washers
• (8) Cavity Plugs
• (2) Sealing Washers
• (1) O-Ring Seal
• (8) Sealing Washers
• (1) Oil Drain Gasket
• (1) Exhaust Outlet Connection Gasket
• (1) Camshaft Cover Seal
• (1) Injector Gasket
• (6) O-Ring Seals
• (3) Gaskets
• (1) Valve Cover Gasket
• (6) HPI/XPI O-Ring Seals
• (2) O-Ring Seals
• (1) Grommet Seal
• (1) Camshaft Cover Gasket
• (1) Cylinder Head Gasket

Warranty: 2-Year, Unlimited Mileage, Parts and Labor Warranty