P621725 Engine Air Filter Fit for Kenworth and Peterbilt - Durable Fit

In this review the P621725 engine air filter is evaluated for truck owners who need a reliable replacement for Kenworth T680, T880 and Peterbilt 567/579 models. The bottom line: this filter is for fleet drivers and owner-operators who want a direct-fit replacement that matches common OEM cross references and offers straightforward service life without surprises. The reviewer found it installs easily, matches listed replacement numbers, and provides the core benefit most buyers need - dependable filtration that fits PACCAR and Cummins engines.

Key Features

• Direct fit compatibility: Designed to replace several factory and aftermarket part numbers so it installs cleanly on Kenworth and Peterbilt applications without modification.
• Broad engine coverage: Compatible with PACCAR MX11, PACCAR MX13 and Cummins X15/ISX engines, making it useful across multiple heavy duty platforms.
• OEM cross references: Replaces known part numbers such as LAF6725, P637453, PA32000, WA11058 and 501058 so buyers can confirm fit against existing service records.
• Simple maintenance: A single-piece air filter that simplifies swapouts during routine service intervals and reduces downtime for professional shops.
• Consistent material: The construction and media type match typical heavy duty filters, providing expected dust capture for highway and vocational use.

Who It's For

The P621725 is aimed at commercial truck operators, fleet maintenance shops and owner-operators running Kenworth T680, T880 or Peterbilt 567/579 who need a like-for-like replacement for common OEM and aftermarket part numbers. It is particularly useful when a known cross reference is required to match service logs or when purchasing for vehicles with PACCAR or Cummins engines.

Buyers who need specialty high-performance or extended-life filtration beyond standard replacement media should look elsewhere, since this product is presented as a direct replacement rather than an upgraded aftermarket performance filter.

Pros & Cons

Pros

• Direct-fit design reduces installation time and avoids compatibility headaches for the listed Kenworth and Peterbilt models.
• Covers multiple engine families including PACCAR MX11, MX13 and Cummins X15/ISX for flexible parts stocking.
• Meets common aftermarket cross references so you can replace several branded part numbers with one SKU.
• Simple construction that is easy to handle during routine service.

Cons

• Not marketed as a performance or extended-life option, so customers seeking higher filtration efficiency or longer intervals should verify specifications before purchase.

Specifications

Product name	P621725 Engine Air Filter
Compatible makes	Kenworth, Peterbilt
Compatible models	T680, T880, 567, 579
Compatible engines	PACCAR MX11, PACCAR MX13, Cummins X15, Cummins ISX
Replaces	LAF6725, P637453, PA32000, WA11058, 501058
Brand	Pasurmu

Our Verdict

The P621725 is a practical, no-frills replacement air filter for Kenworth and Peterbilt trucks that matches common OEM cross references and fits multiple PACCAR and Cummins engines. It represents good value for fleets and owner-operators who need reliable, straightforward filtration and easy serviceability rather than specialty performance upgrades.

Frequently Asked Questions

Will this filter fit my Kenworth T680?
Yes, the filter is listed as compatible with Kenworth T680 and replaces common part numbers used for that model.

Is this suitable for Cummins X15 engines?
Yes, the product notes compatibility with Cummins X15 and Cummins ISX where those engines are used in the listed truck models.

Does it replace Luber-Finer and Baldwin part numbers?
Yes, it lists replacements for LAF6725 and Baldwin PA32000 among other common cross references.