5406187 4376104 Upper Gasket X15 QSX15 ISX15 TOP Gasket

Product Overview

Compatible Engine & Equipment Applications

• Heavy-Duty Highway Trucks: Kenworth T680, Peterbilt 579, Freightliner Cascadia,  VNL, International LT long-haul semi trucks
• Mining & Construction Machinery: Large mining trucks, heavy loaders, industrial excavators and off-road engineering equipment
• Power Generation Systems: QSX15 stationary industrial generator sets and mobile heavy-duty power equipment
• Marine & Special Machinery: Commercial marine auxiliary diesel engines and large industrial power units

Official OEM Part Numbers

Kit Components List

• Upgraded MLS multi-layer steel cylinder head gasket, anti-blowout and high-pressure resistant
• Full set of valve stem oil seals for high-temperature turbocharged operation
• Heavy-duty valve cover gasket and auxiliary sealing cushions
• Intake manifold & exhaust manifold dedicated gaskets
• Upper cooling system gaskets and coolant passage seals
• Turbocharger mounting gasket and upper engine auxiliary O-rings
• All upper engine paper gaskets, rubber seals and precision sealing components

Key Features & Advantages

• Precise OEM Fit: Strictly manufactured according to Cum minsoriginal factory specifications and tolerance standards, this X15 upper gasket set supports direct bolt-on installation without cutting or modification, ensuring a perfect tight fit for stock X15, ISX15 and QSX15 diesel engines.
• Heavy-Duty Sealing Performance: Adopts upgraded MLS multi-layer steel structure and high-temperature resistant materials, professionally optimized for 15L large-displacement high-power heavy-duty engines. It effectively resists extreme combustion pressure and high operating temperature, preventing common failures like head gasket blowout, coolant leakage and engine power drop.
• Excellent Durability & Anti-Aging Ability: All sealing accessories feature premium oil resistance, corrosion resistance and compression resistance, maintaining stable long-term sealing performance under harsh working environments including long-term high vibration, heavy load and continuous operation.
• Complete Top-End Repair Solution: This all-in-one X15 upper gasket kit covers all sealing components required for upper engine maintenance, thoroughly solving typical engine faults such as insufficient cylinder pressure, engine overheating, air leakage and valve train oil leakage.
• High Cost-Effective Repair: Perfectly restores the original power output and fuel economy of Cum minsX15 series engines, avoids repeated maintenance and equipment downtime losses, and greatly extends the service life of heavy-duty diesel engines.

Important Compatibility Notes

Warranty & Service