Performance Diesel Group
PDI Big Boss Stage 1 Performance Kit – Cummins X15 & ISX15 | SKU 7157718
PDI Big Boss Stage 1 Performance Kit – Cummins X15 & ISX15 | SKU 7157718
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PDI Big Boss Stage 1 Performance Kit – Cummins X15 & ISX15
The PDI Big Boss Stage 1 Performance Kit is the ultimate bolt-on upgrade package for Cummins ISX15 and X15 engines. Designed to improve airflow, reduce exhaust restrictions, lower operating temperatures, and increase overall engine efficiency, this comprehensive performance package combines several of PDI's most popular Big Boss components into one proven system.
By addressing both the intake and exhaust sides of the engine, the Stage 1 Kit helps improve turbocharger efficiency, reduce turbo lag, lower exhaust gas temperatures (EGTs), and maximize horsepower potential. Whether you're hauling heavy freight, running mountainous routes, or simply looking to improve reliability and fuel economy, the PDI Stage 1 Kit delivers measurable real-world performance benefits.
Built specifically for owner-operators and performance-minded fleets, the PDI Big Boss Stage 1 Performance Kit is engineered to help your Cummins engine breathe easier, run cooler, and perform more efficiently under load.
What's Included
- PDI Big Boss Exhaust Manifold
- PDI Big Boss Intake Manifold
- Required installation hardware and components
- PDI engineered airflow and exhaust performance package
Key Features
- Complete airflow performance upgrade package
- Designed for Cummins ISX15 and X15 engines
- Improves turbocharger efficiency
- Reduces turbo lag
- Increases airflow throughout the engine
- Helps lower exhaust gas temperatures (EGTs)
- Improves throttle response
- Supports improved fuel economy
- Built for heavy-duty commercial applications
- Made in the USA
Specifications
- Brand: PDI Performance Diesel
- Series: Big Boss™ Stage 1
- SKU: 7157718
- Application: Cummins ISX15 & X15
- Product Type: Performance Upgrade Package
- Installation: Direct Bolt-On Components
- Made In: USA
Applications
Compatible with Cummins ISX15 and X15 powered trucks including Peterbilt, Kenworth, Freightliner, Western Star, Volvo, and International applications. Ideal for long-haul, heavy-haul, vocational, and performance-focused trucking operations.
Performance Benefits
- Improved intake airflow
- Improved exhaust flow
- Reduced turbo lag
- Lower EGTs under load
- Enhanced engine efficiency
- Improved throttle response
- Potential fuel economy improvements
- Improved pulling power on grades
- Reduced thermal stress on engine components
Why Upgrade to a Stage 1 Performance Kit?
Many performance upgrades address only one side of the engine. The PDI Big Boss Stage 1 Kit improves both intake and exhaust airflow, creating a balanced system that allows the turbocharger and engine to operate more efficiently. This integrated approach helps maximize performance while maintaining reliability for daily commercial use.
🔥 The Most Popular Performance Upgrade for Cummins X15 Engines
The Stage 1 Performance Kit combines PDI's proven airflow technologies into one package designed to deliver real-world improvements in power, efficiency, and drivability.
- ✔ Improved airflow from intake to turbo
- ✔ Reduced turbo lag
- ✔ Lower exhaust temperatures
- ✔ Increased engine efficiency
- ✔ Built for heavy-duty trucking applications
- ✔ Made in the USA
Trusted by owner-operators and fleets looking for improved reliability, stronger pulling power, and better overall engine performance.
Why Choose PDI?
PDI Performance Diesel has become one of the most respected names in heavy-duty diesel performance. The Big Boss product line is engineered specifically for commercial trucking applications, delivering measurable improvements in airflow, cooling, durability, and performance without compromising reliability.
Fitment Notice
Verify engine model and application before ordering. Contact us with your engine serial number (ESN) for fitment verification.
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