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Discover top-quality Peterbilt 389 Engine & Performance Parts at 4 State Trucks. Whether you're looking to boost horsepower, improve fuel efficiency, or ensure your engine stays cool, our aftermarket replacement parts have you covered. We offer everything from high-performance turbochargers and exhaust manifolds to reliable cooling systems and custom tuning solutions.

Peterbilt 389 Engine & Performance Parts

Maximize your Peterbilt 389's power and efficiency with top-quality components like fuel systems, turbochargers, exhaust systems, and ECU tuners from brands like FASS, Bully Dog, and Caterpillar. Whether boosting horsepower, improving fuel economy, or enhancing your driving experience, this product line offers the upgrades you need for increased performance and a smoother ride.