null
Shop by Make, Model & Year

International LoneStar Engine & Performance Parts

Boost your International LoneStar's performance with premium engine and fuel system upgrades. This product lineup features high-flow diesel fuel pumps, industrial-grade turbochargers, and advanced tuning modules to increase power, torque, and fuel efficiency. Upgrade key components like injectors, charge air coolers, and exhaust systems to maximize your truck's potential. Add durable, quiet performance mufflers and stylish chrome or black exhaust tips for a customized look. Whether you have a Cummins, Cat, or Detroit Diesel engine, you'll find the necessary parts to elevate your LoneStar's capabilities.

Frequently Asked Questions About International LoneStar Engine & Performance Parts

What engine options are available for the International LoneStar, and which performance parts are compatible with each?

The International LoneStar typically comes with Cummins ISX15, Cummins X15, or International A26 engines. For ISX15 and X15 engines, popular performance upgrades include high-flow air filters, performance ECM tuning modules, and aftermarket turbochargers. The A26 engines work best with cold air intake systems and performance exhaust manifolds. Always verify your specific engine model and serial number before ordering, as compatibility can vary between model years 2009-2021.

How difficult is it to install performance parts on a LoneStar, and what tools do I need?

Installation difficulty varies by part type. Air filters and intake systems typically require basic hand tools and take 1-2 hours. ECM tuning modules usually plug directly into existing connectors and take 30-45 minutes. Exhaust systems and turbo upgrades require more advanced skills, including welding equipment and specialty tools like torque wrenches rated for 150+ ft-lbs. Many drivers report needing impact wrenches for stubborn factory bolts. Professional installation is recommended for major engine modifications to maintain warranty coverage.

Will adding performance parts void my engine warranty or affect emissions compliance?

Most bolt-on performance parts like air filters and intake systems will not void your warranty if properly installed. However, ECM tuning, exhaust modifications, and EGR/DPF deletes will typically void manufacturer warranties and may violate federal emissions regulations. For on-highway use, ensure all modifications are EPA compliant and check your state's specific emissions requirements. Keep all original parts if you need to return to stock configuration for inspections or warranty claims.

What are the most cost-effective performance upgrades that provide noticeable improvements?

Based on customer feedback, the best value upgrades include: high-flow drop-in air filters ($150-300) providing 5-10 HP gains, cold air intake systems ($400-800) offering 15-25 HP increases and improved throttle response, and performance ECM tuning ($500-1500) delivering 50-100 HP gains with better fuel economy. Exhaust upgrades ($800-2000) reduce backpressure and add 20-40 HP. Start with air intake improvements before moving to more expensive modifications.

How do I identify the correct part numbers for my specific LoneStar model year and configuration?

Locate your VIN and engine serial number first - the VIN is on the driver's door jamb and dashboard, while the engine serial is stamped on the engine block near the front left side. Cross-reference these numbers with manufacturer catalogs or contact our tech support with this information. Pay special attention to whether you have a day cab or sleeper configuration, as some parts like exhaust systems have different lengths. Model years 2015 and newer often require different parts than 2009-2014 models due to emissions system changes.


Introducing the Official 4 State Trucks Mobile App – Gear Up On the Go!