Frequently Asked Questions About International 9300/9370 DPF & Mufflers

Will these DPF systems and mufflers fit my specific International 9300 or 9370 model year?

Most aftermarket DPF systems and mufflers for International 9300/9370 trucks are designed to fit models from 2007-2017, when EPA emissions standards required DPF technology. However, mounting brackets and inlet/outlet sizes can vary between early models (2007-2010) and later models (2011-2017). Always verify your truck's exact year, engine type (typically MaxxForce or Cummins ISX), and existing exhaust configuration before ordering. Check the product specifications for inlet/outlet diameters and overall length to ensure proper fitment.

How difficult is it to install a replacement DPF or muffler on my International 9300/9370?

Installation typically takes 2-4 hours for experienced mechanics. The main challenges include properly supporting the exhaust system during removal, ensuring correct alignment of hangers and brackets, and achieving leak-free connections at the clamps. You'll need basic tools including wrenches, penetrating oil for rusted bolts, and potentially a sawzall if pipes are welded. Many drivers report that having a second person helps significantly with alignment. Professional installation is recommended if you're dealing with sensors, as improper installation can trigger fault codes.

What's the difference between OEM and aftermarket DPF filters for my International truck?

OEM DPF filters typically last 200,000-400,000 miles with proper maintenance, while quality aftermarket options often provide 150,000-300,000 miles of service. The main differences are in the substrate material and cell density. OEM filters use cordierite or silicon carbide with specific cell counts matched to your engine, while aftermarket versions may use different materials that still meet EPA standards but at a lower cost. Aftermarket DPFs can save you 40-60% compared to OEM pricing, but ensure they're EPA-compliant and come with proper documentation.

How often should I clean or service the DPF on my International 9300/9370?

DPF cleaning intervals depend heavily on your driving conditions and idle time. For highway applications with minimal idling, cleaning every 150,000-200,000 miles is typical. City driving or high-idle applications may require cleaning every 75,000-100,000 miles. Warning signs that cleaning is needed include frequent regeneration cycles, reduced fuel economy, or dashboard warning lights. Professional cleaning services use specialized equipment to remove ash buildup that passive and active regeneration cycles can't eliminate.

Can I replace just the muffler without changing the entire DPF system?

Yes, the muffler and DPF are separate components in the International 9300/9370 exhaust system. The muffler is typically located downstream from the DPF and can be replaced independently. When replacing just the muffler, ensure the inlet and outlet diameters match your existing pipes (usually 5-inch diameter). Popular replacement options include straight-through designs for better flow or chambered mufflers for quieter operation. This is often a cost-effective solution if your DPF is functioning properly but the muffler has rusted through or become damaged.