Frequently Asked Questions About International LoneStar DPF & Mufflers

Will these DPF and muffler systems fit my specific International LoneStar model year?

Our DPF and muffler systems are designed to fit International LoneStar trucks from 2009 to present. However, there are variations between model years, particularly in mounting bracket configurations and pipe diameter specifications. Models from 2009-2012 typically use a 5-inch inlet/outlet diameter, while 2013 and newer models may have different specifications. Always verify your truck's VIN and engine type (ISX15, X15, or MaxxForce) before ordering to ensure proper fitment.

What's the difference between OEM and aftermarket DPF systems, and how does it affect performance?

OEM DPF systems are manufactured to exact International specifications and typically last 200,000-400,000 miles with proper maintenance. Aftermarket options can save you 40-60% in cost while meeting EPA compliance standards. The main differences include filter substrate density, housing materials (aluminized steel vs. stainless steel), and warranty coverage. Aftermarket systems may require more frequent cleaning intervals (every 150,000-200,000 miles) compared to OEM, but offer comparable performance when properly maintained.

Can I install these DPF and muffler systems myself, or do I need professional installation?

While experienced mechanics can install these systems, we recommend professional installation due to the complexity of modern emission systems. Installation typically requires 3-5 hours and involves proper torque specifications (80-100 ft-lbs for band clamps), exhaust system alignment, and electronic calibration. You'll need specialized tools including a torque wrench, exhaust hangers, and potentially diagnostic software to clear DPF codes. Improper installation can void warranties and trigger check engine lights.

How do I know when my DPF needs cleaning or replacement instead of just buying a new muffler?

Monitor your truck's DPF pressure differential gauge - readings above 6.0 psi typically indicate cleaning is needed. Warning signs include frequent regeneration cycles (more than once per day), reduced fuel economy (drop of 1-2 MPG), loss of power during acceleration, and exhaust temperatures exceeding 1,200 degrees Fahrenheit. If cleaning doesn't restore performance after 2-3 services, or if you see visible cracks, melting, or substrate damage during inspection, replacement is necessary.

What warranty coverage should I expect, and what voids the warranty on these systems?

Most DPF and muffler systems include a 12-24 month warranty covering manufacturing defects and premature failure under normal use. Warranty typically covers the DPF filter, housing integrity, and mounting hardware. Common warranty exclusions include damage from contaminated fuel, engine oil consumption issues, failure to perform required maintenance, use of non-approved cleaning methods, and any modifications or tampering with the system. Keep all maintenance records and follow recommended service intervals to maintain warranty coverage.