Part Number: 054619

Rebuilding your high-horsepower Cummins X15 (605HP)? This complete in-frame overhaul kit is engineered to handle the demands of heavy-duty applications. Built for engines with CPL 4343, it includes top-tier components like 150MM APR liners and fracture-split rod bearings—giving you performance and durability you can count on.

🔍 What Makes This Kit High-Quality?

🧱 150MM APR Liners
APR stands for Anti-Polishing Ring—a hardened insert at the top of the liner that prevents carbon buildup. This improves sealing and protects your piston skirts and cylinder walls.

• Reduces oil consumption

• Prevents cylinder glazing

• Ideal for heavy-duty, high-HP applications like the 605HP X15

🔩 Fracture-Split Rod Bearings
Fracture-split rods are stronger and more precise than traditional saw-cut rods. Instead of machining, they’re broken apart at the cap for a perfect fit.

• Superior alignment

• Stronger under load

• Required for CPL 4343 engines

📦 Kit Components:

Cylinder & Piston Group

• 6 complete cylinder kits with 150MM APR liners

• Pistons (matched, no wrist pins)

• Piston cooling nozzles (based on serial number)

Bearings & Internal Components

• Main bearing set (standard size)

• Thrust washers

• Rod bearing sets (for fracture-split rods)

Gasket Sets & Seals

• Full head gasket set with valve cover gasket

• Cylinder head gasket

• Intake manifold gasket

• Exhaust outlet gasket

• Valve cover gasket

• Oil pan gasket

• Thermostat housing gasket

• O-rings, rectangular strip seal, and misc. seals

Cooling & Hardware

• Thermostat (180°F)

• Shim and oil bypass valve plunger

• High-temp studs

• Hex head nuts

• Installation packaging kits

⚙️ OEM Reference: 5693831
🚛 Fitment: Cummins X15 605HP, CPL 4343
🛡️ Warranty: 2 Years

🔁 Cross-Reference:

• 5579308

• 5693831

• ISX123-113

• M-5579308

Have questions? Call Texas Truck Market at 832-867-3345 and we’ll make sure you get the right kit for your engine.