Replace & Upgrade Your Peterbilt Engine Components

Your Peterbilt isn’t just a truck—it’s your business, your reputation, and your livelihood. When you depend on your rig to perform day after day, you can’t cut corners with the engine parts you use. That’s why 4 State Trucks offers aftermarket Peterbilt engine parts built to handle real-world miles and the toughest jobs out there. Upgrading and maintaining your engine with quality parts isn’t just smart—it’s essential. Here’s why: Better engine protection: Crankshaft dampers and motor mount bushings cut down harmful vibrations that wear out your engine from the inside out. Simpler, cleaner maintenance: Oil drain valves speed up oil changes, helping you stay on top of service without the mess or downtime. Power when you need it: Upgraded turbochargers and charge air coolers improve combustion, boost torque, and keep your Peterbilt pulling hard, even under a full load. Smarter cooling: Radiators and intercoolers regulate temps when you’re hauling heavy or climbing hills, protecting your engine from overheating and serious damage. Fuel and emissions efficiency: Precision parts like variable valve timing solenoids and upgraded exhaust manifolds help your engine breathe better, burn cleaner, and deliver more miles per gallon. Less idling, more comfort: APUs (Auxiliary Power Units) power your cab’s A/C and electronics without running your engine, saving fuel, reducing wear, and making life on the road a whole lot easier. Every heavy-duty engine part you replace today helps you avoid major repairs down the road. When you're shopping for engine parts of a truck, keep in mind that every individual upgrade you make now can boost efficiency, performance, and reliability when you need it most.

Heavy Duty Truck Parts You Can Trust

- Built tough for heavy-duty, long-haul trucking demands. - Designed for the perfect fit on models like the Peterbilt 379, 389, 386, 387, and more. - Helps protect critical engine systems and boost truck life. - Cuts down on costly downtime, saving you fuel, time, and money. - Fast, reliable shipping and real truck experts ready to help answer questions.

Shop Semi Truck Commercial Engine Parts at 4 State Trucks

Keep your Peterbilt running cooler, stronger, and longer. Pair your upgrades today by shopping for Peterbilt truck exhaust parts and powerful suspension upgrades with Peterbilt frame and chassis components. Shop aftermarket engine parts at 4 State Trucks today—and stay ready for every mile and every load.