Frequently Asked Questions About Peterbilt 567/579 Engine & Performance Parts

Will these performance parts work with my specific Peterbilt 567 or 579 model year?

Most engine and performance parts for Peterbilt 567/579 models are compatible across 2013-present model years, but there are important exceptions. Pre-2017 models may require different turbo configurations, and EPA regulations changed exhaust requirements for 2018+ models. Always verify your engine type (Cummins X15, PACCAR MX-13, etc.) and model year before ordering. If you're unsure, contact our team with your VIN number for exact fitment confirmation.

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

Installation requirements vary significantly by part type. Air intake systems and exhaust tips typically require basic hand tools and 2-4 hours of installation time. However, turbo upgrades, EGR deletes, and ECM tuning require specialized diagnostic tools and professional installation to avoid engine damage and warranty issues. We recommend professional installation for any parts requiring ECM programming or emissions modifications.

What's the real-world difference between aftermarket and OEM performance parts?

Quality aftermarket parts from reputable manufacturers like BD Diesel, ATS Diesel, and Banks Power often match or exceed OEM specifications while offering better value. Key differences include: aftermarket parts typically provide 15-30% cost savings, may offer enhanced performance features, and often include better warranties. However, OEM parts guarantee exact fit and may be required for warranty compliance. We only stock aftermarket brands with proven track records in commercial trucking applications.

How do performance modifications affect my truck's fuel economy and reliability?

Properly selected performance parts can improve both fuel economy and reliability. Cold air intakes typically yield 1-3% MPG improvement, quality exhaust systems can add another 2-4%, and ECM tuning can provide 5-10% gains when properly calibrated. However, aggressive tuning or mismatched components can decrease reliability and void warranties. Focus on complementary upgrades (intake, exhaust, and tuning together) and avoid exceeding manufacturer torque/horsepower limits by more than 15-20% for optimal longevity.

Are these parts compliant with DOT regulations and state emissions requirements?

Compliance varies by part and location. All our street-legal parts are clearly marked as "50-state legal" or specify which states they're approved for. Delete kits, DPF removal pipes, and certain tuners are for off-road use only and not legal for highway use. California, New York, and several other states have strict emissions enforcement with heavy fines. Before purchasing any emissions-related parts, verify your state's current regulations and whether you need to maintain emissions compliance for your operating requirements.