Restore commercial exhaust emission system performance with this premium Skyline aftermarket Cummins 4965227 / PACCAR Q621376 Diesel Particulate Filter (DPF) Replacement. This brand-new unit serves as a direct alternative to OEM numbers 4965227, Q621376, 4965227NX, 4965227RX, 5579363, 5579363NX, 5579363RX, and A064C117. Engineered as an exact-fit replacement for medium-duty commercial trucks running Cummins ISB 6.7L and PACCAR PX-6 6.7L engine models, it requires no exhaust system modifications for installation, carries zero core charge, and ships free within the continental United States.

Cummins 4965227 / PACCAR Q621376 Cross Reference Interchange Matrix

How to Verify Your Unit: This direct-fit particulate filter replaces exhaust components stamped with housing, casting, or manufacturing tags matching any of the interchangeable assembly numbers or supplier cross-references listed below:

Choose Your Kit Configuration

Select the setup from the product options above that best fits your shop's needs:

• Full Kit (Best Value): Includes (1) Brand-New DPF, (2) 2871451 Original Equipment Quality gaskets, and (2) 2871861 clamps.
• DPF Only: Includes the replacement DPF only. Installation gaskets and clamps are not included.

Key Features & Specifications for Part 4965227 / Q621376

• Proudly Built in the USA: Designed, engineered, and manufactured in America.
• No Core Charge: Brand-new aftermarket component; eliminates the hassle and downtime of shipping a dirty core back.
• Exact-Fit™ Technical Dimensions: Engineered with OEM-matching inlet/outlet diameters, pre-machined sensor ports, and factory-spec hanger alignments for direct exhaust installation with zero exhaust system modifications required.
• Substrate Performance Matrix: Advanced flow-through wall-flow core utilizes optimized precious metal washcoat loading to maintain optimal exhaust temperatures and long-term emission control.
• Industry-Leading Warranty: Backed by a 3-year unlimited mileage warranty on all Skyline aftermarket solutions.
• EPA Compliant: Meets all federal emissions standards for particulate matter reduction requirements.
• Free Shipping: Free ground shipping within the continental United States. Orders placed before 2:00 PM Eastern ship out the same business day.

Cummins 4965227 / PACCAR Q621376 Vehicle Fitment Guide

Direct alternative solution for commercial vehicles equipped with mid-range Cummins and PACCAR engines. Optimized for:

• Engine Platforms: Cummins ISB 6.7L and PACCAR PX-6 6.7L variants
• Chassis Fitments: This filter configuration accommodates standard conventional box trucks, utility chassis, drop-frame delivery step vans, and municipal vocational trucks:
  • Freightliner DPF Applications: Business Class M2 106 and M2 112 medium-duty models.
  • Kenworth DPF Applications: T170, T270, and T370 conventional frames running the PACCAR PX-6 block.
  • Peterbilt DPF Applications: Conventional models 330, 335, 337, and 348 matching the Q621376 tracking number.
  • International / Navistar DPF Applications: DuraStar 4300 / 4400 Series and WorkStar severe-duty medium chassis.
  • Thomas Built Bus Fleet Layouts: Saf-T-Liner C2, HDX, and EF series passenger bus variants.
  • Blue Bird Bus Fleet Layouts: All American and Vision school or commercial transit chassis.
  • IC Bus (Navistar) Layouts: CE Series and RE Series school transit platforms.
  • Gillig Bus Fleet Layouts: Low Floor and Phantom regional transit architectures.

Compatible OEM Assembly Numbers & Stamped Identification Marks: 2871537, 2871887, 4965044, 4965148, 4965176

Signs Your Cummins DPF Needs Replacement

• Frequent, unprompted, or incomplete DPF regeneration cycles linked to fault codes matching 4965227 / Q621376
• Excessive particulate soot loading or exhaust face-plugging at the filter module core face
• Active dashboard diagnostic trouble codes (DTCs) signaling low soot capacity or filter cracking
• Unexplained commercial engine backpressure increases or gradual exhaust system power loss

*Note: Always verify exact vehicle compatibility using your engine serial number, emissions family descriptor tag, or the original stamped OEM part number on your filter unit casing before placing an order.

Disclaimer: Product images for reference only. Final replacement hardware items matching OEM 4965227 / Q621376 such as gaskets, clamps, and sensor ports depend on your kit configuration. Selecting the "Full Kit" option adds the explicitly listed installation components to your shipment.