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S400 Cummins ISX / ISX15 / X15 Complete Turbo Conversion Kit
Choose Options$4,799.00 - $4,999.00 -
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Cummins ISX15 / X15 Performance
Cummins ISX15 Performance & Replacement Parts
Diesel Power Source engineers high-performance turbos and exhaust manifolds for the Cummins ISX15 engine used in Class 8 semi-trucks and heavy-duty industrial applications. Built for consistent power under load, these upgrades deliver improved airflow, lower EGTs, and extended turbo life—keeping fleets productive and profitable.
Every DPS ISX15 performance part is designed to meet the rigorous demands of commercial trucking. Using high-nickel, thick-wall cast materials and CNC precision machining, our components outperform factory parts in both flow and durability. Whether you're maintaining a single rig or managing a fleet, Diesel Power Source offers solutions that boost efficiency, reliability, and performance without compromising emissions compliance.
Why Upgrade Your Cummins ISX15?
- Lower Exhaust Gas Temperatures (EGTs): Increased flow reduces backpressure, preventing heat buildup under sustained heavy loads.
- Improved Fuel Efficiency: Optimized air-to-fuel ratios enhance combustion for measurable MPG gains on long hauls.
- Extended Engine Life: Cooler operating conditions and balanced airflow help reduce strain on pistons, valves, and turbos.
- Stronger Materials: High-nickel castings resist cracking and fatigue caused by thermal expansion and vibration.
- OEM-Compatible Fitment: Bolt-on design for easy installation with factory hardware and turbo configurations.
Applications Supported
- Cummins ISX15 CM2350 / CM2250: Designed for modern EPA-compliant engines with precision flow characteristics.
- ISX Dual Cam & Single Cam Variants: DPS manifolds and turbos fit both configurations with minimal modification.
- Class 8 Trucks: Freightliner, Peterbilt, Kenworth, Volvo, International, and Western Star platforms supported.
Top ISX15 Performance Upgrades
- ISX15 Exhaust Manifolds: High-flow, crack-resistant designs that stabilize boost pressure and improve turbo spool.
- ISX15 Turbo Conversion Kits: Increase power and reliability with conversion options engineered for direct fitment.
- S400 Turbo Systems: Ideal for fleets or performance builds seeking maximum boost control and efficiency.
- Replacement Turbochargers: Direct-fit replacements with improved bearing life and temperature resilience.
Fitment & Maintenance
- Fits Cummins ISX15 14.9L engines in Class 8 on-highway trucks and heavy-duty applications.
- Always replace manifold and turbo gaskets during installation for proper sealing.
- Use high-temp anti-seize and re-torque fasteners after initial heat cycles.
- Compatible with both OEM and aftermarket EGR configurations when installed correctly.
Built for Fleet Efficiency & Reliability
Owner-operators and fleet managers rely on DPS for reduced downtime, stronger pulling power, and long-term reliability. Our ISX15 components are proven in both vocational and long-haul environments—supporting sustained boost pressure, stable EGTs, and efficient exhaust flow mile after mile.
Explore related categories: ISX15 Exhaust Manifolds, ISX15 Turbo Conversion Kits, and Commercial & Semi Performance Parts.
For smaller engine platforms, view Dodge Cummins Performance or Add-A-Turbo Kits.
Frequently Asked Questions
Are DPS ISX15 parts compatible with factory emissions systems?
Yes. Many Diesel Power Source ISX15 components are designed for emissions-equipped engines. Always verify part specifications and follow federal and local emissions guidelines.
Will upgrading my ISX15 improve fuel economy?
In most cases, yes. Smoother airflow and reduced backpressure help the ISX15 engine burn fuel more efficiently, often improving mileage under load.
Do I need tuning after installing an ISX15 turbo or manifold?
No tuning is required for direct-replacement parts. However, if additional fueling or airflow modifications are made, calibration can further optimize performance.
Are DPS ISX15 manifolds stronger than OEM?
Yes. Our manifolds use thick-wall, high-nickel cast iron and precision CNC machining, significantly reducing cracking and warping common with OEM designs.
Can fleets purchase ISX15 parts in bulk?
Absolutely. Diesel Power Source offers dealer and fleet programs with volume pricing and logistics support for ongoing maintenance needs.
