Delorin Air Filter P621725 — Compatible with Kenworth T680/T880 & Peterbilt 567/579, High Dust-Holding Direct-Fit

Delorin P621725 is a heavy-duty replacement air filter engineered to fit Kenworth T680/T880 and Peterbilt 567/579 models, providing reliable particulate capture and compatible fit in place of LAF6725, P637453, PA32000, WA11058, and 501058.

This Delorin drop-in filter is built for commercial truck engines that require a precise seal, high dust-holding capacity, and consistent airflow. Designed as a direct-fit aftermarket alternative to common OEM and aftermarket part numbers, it suits PACCAR and Cummins gas and diesel applications listed for these chassis. The construction balances pleated media area and structural support to help maintain engine breathing performance across long haul and regional routes.

Will this Delorin filter fit my Kenworth T680 or T880 engine?

Yes — the P621725 is manufactured to match the dimensions and sealing profile used in Kenworth T680 and T880 installations for the specified engines. It supports PACCAR MX11, MX13 and Cummins X15 or ISX engines where the referenced original part numbers are specified. Verify your vehicle’s existing part number to ensure compatibility before ordering.

• Fits Kenworth T680 with PACCAR MX13, MX11, Cummins X15 engines
• Fits Kenworth T880 with PACCAR MX13, MX11, Cummins ISX/X15
• Direct replacement for Paccar P621725 and listed aftermarket cross-references

How does this filter compare to the original and other aftermarket options?

The Delorin P621725 duplicates critical dimensions and sealing features so it installs like the original and performs under comparable conditions. Its pleated filtration media increases surface area for dust capture while the reinforced endcaps keep the element stable under vibration. Delorin aims for consistent airflow characteristics to avoid restriction-related performance losses.

• Equivalent footprint and seal to OEM P621725
• High-surface pleated media for longer service intervals
• Rigid endcaps to resist collapse and maintain shape

What maintenance intervals and operating conditions suit this filter?

Service interval depends on operating environment: dusty, off-road, or winter-salt conditions require more frequent replacement compared with highway-only use. Inspect the filter during scheduled maintenance or if you notice increased intake restriction or reduced power. Replacing at manufacturer-recommended intervals helps protect turbochargers and internal components from abrasive particles.

• Check at each major service or if engine intake issues appear
• Replace sooner in dusty or construction environments
• Follow vehicle OEM guidance for mileage-based intervals

Which part numbers does the Delorin P621725 replace?

The Delorin P621725 cross-references several widely used OEM and aftermarket numbers, making it a versatile stocking choice for fleets and independent shops. If your current filter’s number matches any listed below, P621725 is intended to be a compatible substitute. Always compare physical dimensions and sealing style when switching brands.

• Paccar P621725
• Luber-Finer LAF6725
• Donaldson P637453
• Baldwin PA32000, Wix WA11058, NAPA 501058

Who this is for: The Delorin P621725 is aimed at fleet managers, owner-operators, and service technicians who need a reliable, direct-fit air filter replacement for Kenworth T680/T880 and Peterbilt 567/579 trucks. It’s a practical choice for those stocking parts across PACCAR and Cummins engine platforms who want an aftermarket element that mirrors OEM dimensions and cross-references popular part numbers.