Boost power and improve fuel efficiency. If you're looking to elevate the driving experience of your classic Peterbilt 379 truck, engine performance parts can get you what you need.

Get Quality Peterbilt 379 Replacement Engine Components

Whether you're hauling heavy loads, running long miles, or just want more control over your truck's output, our extensive lineup of aftermarket performance, reliability, and customization serious drivers demand. From turbochargers and performance exhaust manifolds to diesel tuners, scan gauges, and quiet mufflers, we stock just about everything you might need to enhance your truck's power, torque, and fuel economy while protecting your Cummins engine for the long haul.

The Benefits of Upgrading Your Peterbilt 379 Engine Performance

Every part in this product lineup is designed to unlock hidden potential from your Caterpillar, Cummins, or Detroit Diesel engine. Whether you're chasing fuel savings or raw pulling power, our Peterbilt 379 tuning parts offer performance that fits your driving style and operating conditions. Here's what you ll find in our performance lineup: - Aftermarket Turbochargers: Increase airflow and boost pressure with high-quality aftermarket turbos that offer faster spool-up and improved durability. Get more power when you need it and better throttle response when climbing hills or overtaking. - Aftermarket Diesel Tuners & Programmers: Plug-and-play diesel tuners give you access to multiple performance tunes for more horsepower and torque. Fine-tune fuel maps and boost pressure to fit your load and terrain and get better mileage when driven right. - Aftermarket FASS Diesel Fuel Systems: Improve fuel quality and combustion with a FASS Industrial Series setup. It removes air, water, and debris from your diesel, which can lead to better throttle response, increased injector life, and more efficient fuel burn. - Aftermarket Performance Exhaust Manifolds & Quiet Mufflers: Reduce backpressure, boost flow, and improve exhaust evacuation with aftermarket manifolds and quiet mufflers. You'll get more power and less noise without sacrificing efficiency. - Aftermarket Flywheel Housings & Belt Tensioner Assemblies: Upgrade your flywheel housing for improved alignment and reduced drivetrain vibration, or replace your belt tensioner for better reliability and smoother accessory drive especially critical for high-RPM engines under load. - Scan Gauges: Add a Scan Gauge KR to monitor your truck's real-time performance: boost, fuel economy, engine temps, and more. It's the easiest way to fine-tune your driving for maximum efficiency and early problem detection. - Fuel Heater Kits: If you drive in cold climates, an electric diesel fuel heater kit can prevent gelling, improve winter starts, and keep your engine running smooth when the temps drop. Why upgrade your Peterbilt 379's engine with aftermarket performance parts? Here's what these motor parts for Peterbilt 379 can do for your truck: - Increase Horsepower & Torque: Perfect for pulling steep grades and heavy trailers. - Improve Fuel Efficiency: Cleaner fuel, optimized airflow, and precise tuning means more miles per gallon. - Enhance Throttle Response: Less lag, faster spool, better drivability. - Extend Engine Life: Reduce wear on injectors and critical components. - Smooth Out Operation: Reduce vibrations, balance power delivery, and support better drivetrain performance. - Better Cold-Weather Starts: No more hard starts in freezing temps

Signs You Need to Replace Your Semi Truck Engine Parts

Here are some signs that you might need to upgrade or replace your existing Peterbilt 379 engine parts: - Loss of power or boost. - Poor fuel mileage. - Exhaust leaks or ticking sounds. - Whining turbo or visible shaft play. - Belt squealing or tensioner bounce. - Excessive noise or vibration. - Slow cold-weather starts.

Enhance Your Rig’s Performance Today

Our lineup of replacement parts for the Peterbilt 379 engine are sourced from trusted brands and built to withstand the daily grind of heavy-duty use. Many are direct-fit replacements and are designed to match your truck's factory systems for easier installation. Consider replacing various cooling components like fan blades and shrouds or replacement Pete 379 charge air coolers. You can find find replacement cooling hoses and gaskets as well. Just be sure to check for emissions compliance in your area, and consider professional installation for the best results. Take control of your engine's potential. Shop aftermarket Peterbilt 379 engine performance parts today and experience the difference in power, efficiency, and reliability.

Frequently Asked Questions About Peterbilt 379 Engine & Performance Parts

Will these performance parts fit my specific year Peterbilt 379?

Most engine and performance parts for the Peterbilt 379 are compatible with models from 1987 to 2007. However, there are important differences between pre-2000 and post-2000 models, particularly in electronics and emissions systems. Always verify compatibility by checking your engine model (CAT 3406B/C/E, Cummins N14, Detroit Series 60) and serial number. When ordering, provide your VIN or call our technical support team at 1-888-875-7787 for confirmation.

What are the most noticeable performance gains from upgrading air intake and exhaust systems?

Upgrading to a high-flow air filter and performance exhaust typically yields 15-30 HP gains and 50-75 lb-ft of torque improvement. Drivers commonly report better throttle response, reduced turbo lag, and 0.5-1 MPG fuel economy improvement. Keep in mind that actual gains depend on your current setup and engine condition. For maximum benefit, combine intake and exhaust upgrades with proper ECM tuning.

Do I need special tools or professional installation for most performance upgrades?

Basic upgrades like air filters, exhaust tips, and gauges require standard hand tools and take 1-3 hours. However, turbo upgrades, ECM programming, and internal engine modifications require specialized tools and expertise. We recommend professional installation for any parts affecting emissions systems or requiring ECM changes. Installation difficulty is listed on each product page, and we provide detailed instructions with every order.

Which performance parts maintain my warranty and comply with emissions regulations?

EPA-compliant parts like OEM-replacement filters, DOT-approved exhaust components, and factory-spec rebuild kits maintain warranty coverage. Performance chips, DPF deletes, and modified exhaust systems may void warranties and violate emissions laws in certain states. Check your local regulations before ordering. We clearly mark all products as either "50-State Legal" or "Off-Road Use Only" to help you stay compliant.

What's the typical lifespan of aftermarket performance parts compared to OEM?

Quality aftermarket parts from reputable brands like Donaldson, FleetGuard, and PDI typically match or exceed OEM lifespan. Air filters last 50,000-100,000 miles with proper maintenance, performance exhaust systems average 500,000+ miles, and quality turbochargers run 300,000-500,000 miles. Cheaper alternatives may only last 25-50% as long. We only stock parts that meet or exceed OEM specifications and back them with manufacturer warranties.