Frequently Asked Questions About Mack CV/GU Truck DPF & Mufflers

Will these DPF and muffler systems fit my specific Mack CV or GU model year?

Our DPF and muffler systems are designed to fit Mack CV and GU models from 2008 onwards, when emissions regulations required DPF systems. However, there are variations between model years, especially between pre-2013 and post-2013 models due to EPA regulation changes. Always verify your specific truck's VIN and engine model (MP7 or MP8) before ordering. If you're unsure, contact our support team with your truck's details for exact fitment confirmation.

How difficult is the installation process, and what tools do I need?

Installation typically takes 3-5 hours for experienced mechanics and requires standard shop tools including impact wrenches, socket sets, and lifting equipment. The most challenging aspects are properly aligning the exhaust clamps and ensuring all sensors are correctly reconnected. You'll need new gaskets and clamps (often sold separately) for proper installation. Many customers report that having a second person helps significantly with positioning the heavier DPF units. Professional installation is recommended if you lack experience with exhaust systems.

What's the actual lifespan of these aftermarket DPF systems compared to OEM?

Quality aftermarket DPF systems typically last 200,000-300,000 miles with proper maintenance, which is comparable to OEM units. The key factor is regular cleaning intervals - every 150,000-200,000 miles depending on your duty cycle. Heavy-duty applications or frequent idle time may require more frequent servicing. The internal catalyst material and construction quality are the main determinants of longevity, so stick with EPA-certified options that meet or exceed OEM specifications.

Are these replacement systems compliant with emissions regulations in all states?

All DPF and muffler systems we carry are EPA-certified and meet federal emissions standards. However, California has additional CARB (California Air Resources Board) requirements that may require specific certifications. If you operate in California or other CARB-adopting states, verify that the specific part number you're considering has CARB Executive Order approval. This information is typically listed in the product specifications or can be confirmed by contacting us directly.

What's the difference between a DPF muffler combo unit and separate components?

Combo units integrate the DPF and muffler into a single assembly, offering easier installation, fewer connection points (reducing potential leak areas), and often lower overall cost. Separate components provide more flexibility for custom exhaust routing and easier individual component replacement if one part fails. Combo units are generally preferred for standard applications, while separate components work better for trucks with modified wheelbases or custom exhaust configurations. Consider your maintenance preferences and truck configuration when choosing between the two options.