Frequently Asked Questions About Mack CH/CHN/CHU Truck DPF & Mufflers

Will these DPF and muffler systems fit my specific Mack CH series truck year and engine model?

Our DPF and muffler systems are designed for Mack CH, CHN, and CHU models typically ranging from 2007-2015, coinciding with EPA emission requirements. However, compatibility depends on your specific engine model (MP7, MP8, etc.) and chassis configuration. Before ordering, check your truck's VIN plate and existing exhaust part numbers, or contact our support team with your truck's year, model, and engine type for verification. Note that some aftermarket modifications may affect fitment.

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

Installation typically takes 3-6 hours for experienced technicians. You'll need standard shop tools including impact wrenches, jack stands, and torque wrenches. Most installations require removal of the old system, proper alignment of new clamps and hangers, and potential ECM programming for DPF systems. While mechanically inclined individuals can perform the installation, we recommend professional installation for DPF units to ensure proper sensor connections and avoid check engine lights. Muffler-only replacements are more straightforward and suitable for DIY installation.

What's the difference between OEM and aftermarket DPF systems in terms of quality and longevity?

OEM DPF systems typically last 200,000-400,000 miles with proper maintenance, while quality aftermarket units can achieve similar lifespans at 30-50% less cost. The key differences are in the substrate material and precious metal coating quality. Our aftermarket options use either cordierite or silicon carbide substrates with platinum-group metal coatings that meet or exceed EPA standards. Look for units with stainless steel housings (409 or 304 grade) and documented flow rates matching OEM specifications for best results.

How often do I need to perform manual regeneration, and what are the warning signs of a failing DPF?

Manual regeneration frequency varies based on driving conditions - long-haul drivers may need it every 300-500 miles, while local drivers might require it every 100-200 miles. Warning signs of DPF failure include frequent regeneration requests, reduced fuel economy (10-20% drop), loss of power, excessive black or white smoke, and dashboard warning lights. If you're regenerating more than once daily or see soot levels above 80% consistently, have your DPF inspected immediately to prevent costly engine damage.

Can I replace just the muffler without changing the entire exhaust system, and what sound level options are available?

Yes, mufflers can be replaced independently if your DPF and pipes are in good condition. We offer three main sound levels: OEM-quiet (80-82 dB), moderate (83-86 dB), and performance (87-90 dB). Ensure your choice complies with local noise ordinances - many states limit trucks to 90 dB. When replacing just the muffler, match the inlet/outlet diameter (typically 5 inches) and verify the overall length fits your frame rails. Straight-through designs offer better flow but increased noise, while chambered designs provide quieter operation with slightly reduced flow.