Frequently Asked Questions About Kenworth T700 DPF & Mufflers

What year models of Kenworth T700 are these DPF systems and mufflers compatible with?

Our DPF systems and mufflers are designed for Kenworth T700 models from 2008 to 2019. The 2008-2012 models typically use different mounting brackets than 2013-2019 models due to chassis updates. Always verify your specific engine model (Cummins ISX, PACCAR MX) as some components vary by engine type. Check your VIN or contact our support team if you're unsure about compatibility for your specific truck.

How difficult is it to install a replacement DPF or muffler, and what tools are required?

Installation typically takes 2-4 hours for experienced mechanics. You'll need basic hand tools, a socket set (including larger sizes up to 24mm), penetrating oil for rusted bolts, and jack stands or a lift. The most challenging part is usually removing corroded clamps and hangers. We recommend having new clamps and gaskets on hand. While DIY installation is possible, many customers prefer professional installation due to the weight of these components (DPFs can weigh 60-80 pounds).

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

OEM DPF systems typically last 200,000-400,000 miles with proper maintenance, while quality aftermarket units generally achieve 150,000-300,000 miles. The main differences are in the catalyst coating density and substrate material. Aftermarket options often provide 70-85% of OEM performance at 40-60% of the cost. For trucks with over 500,000 miles or those not requiring maximum fuel efficiency, aftermarket DPFs offer excellent value. Always ensure any aftermarket DPF meets EPA compliance standards.

How do I know when my DPF needs replacement versus just cleaning?

Signs your DPF needs replacement include: frequent regeneration cycles (more than once per day), check engine lights with codes P2002 or P244B, excessive black smoke, or fuel economy dropping by more than 15%. If your DPF has been cleaned 2-3 times already, replacement is usually more cost-effective than another cleaning. A pressure test showing readings above 5.0 psi at idle also indicates replacement is needed. DPFs with visible cracks, melted substrate, or over 500,000 miles typically require replacement rather than cleaning.

Are stainless steel mufflers worth the extra cost compared to aluminized steel?

Stainless steel mufflers last 8-12 years versus 3-5 years for aluminized steel, making them worthwhile for high-mileage operations or trucks in salt-belt states. The 20-30% higher upfront cost is offset by longer replacement intervals. Stainless steel also maintains better appearance and resale value. However, if you trade trucks every 3-4 years or operate in dry climates, aluminized steel provides adequate protection. Consider your typical ownership period and operating environment when making this decision.