Ensure Longevity with the Cummins 4089758 Upper Gasket Set

For 8.3L QSC | ISC | ISL | 6C Engines

Built for uptime. The Cummins 4089758 Upper Engine Gasket Set provides everything you need for a dependable top-end rebuild on heavy-duty 8.3L engines. Trusted by mechanics and fleet professionals, this kit is engineered to deliver long-lasting sealing and peak operational efficiency.

Quick Specs

What’s Inside?

• Cylinder Head Gasket (standard thickness)

• Valve Cover Gasket

• Exhaust & Intake Manifold Gaskets

• Turbo Mounting Gaskets

• Rocker Lever Housing Gasket

• Fuel Fitting O-Rings & Turbo Seals

 Designed to resolve issues like oil leaks, coolant seepage, and boost loss in high-performance or commercial diesel environments.

Compatibility Snapshot

This gasket set fits a wide range of Cummins 8.3L-based engines, including:

• Truck Brands: Kenworth, Peterbilt, Freightliner

• Heavy Vehicles: Buses, Motorhomes

• Equipment: Marine gensets, forklifts, industrial machinery

Some ISLe and CM8.9L models also supported—ask our team to confirm fitment.

Why Fleets Choose Volgen Power

• OEM-Level Quality: Meets or exceeds Cummins specs

• Bulk-Ready: Volume pricing for service centers & fleets

• Engine-Safe Materials: Designed for heat and pressure endurance

• Versatile Coverage: One kit, multiple platforms

Keep Your 8.3L Working Hard

Whether you’re prepping for preventative maintenance or a full top-end overhaul, the 4089758 Upper Gasket Set is a critical step toward maintaining operational excellence.

Request a Quote today to get fleet pricing and fast fulfillment.