AF55015 Primary Air Filter for Cummins QSF2.8, QSF3.8, QSB4.5 Engines
AF55015 primary air filter for Cummins QSF2.8, QSF3.8, QSB4.5 engines. Pairs with secondary AF55309. Cross reference CA7100, 5261250. Factory direct.
Description
The AF55015 air filter is a primary engine air filter manufactured by Cummins Filtration (Fleetguard) for Cummins QSF2.8, QSF3.8 and QSB4.5 engines, commonly paired with the AF55309 secondary safety element for complete two-stage intake protection. It’s also broadly cross-referenced across the wider Cummins QSL9/QSC/QSL/QSB/QSBT3/QSBT4 engine family. IXIN Filter manufactures this filter to OEM-equivalent specifications, giving distributors and dealers a reliable, factory-direct alternative for scheduled air filter replacement.
As an IATF 16949-certified filter manufacturer, IXIN supplies the AF55015 air filter to distributors and service centers in 60+ countries, with consistent batch quality and full traceability for bulk and OEM orders.
Product Specifications
| Attribute | Detail |
|---|---|
| Product Type | Primary Engine Air Filter |
| Inner Diameter | 2.5039 in (64 mm) |
| Outer Diameter | 4.0020 in (102 mm) |
| Height | 9.75 in (248 mm) |
| Unit Weight | 1.0999 lb (0.499 kg) |
| Certification | IATF 16949 |
Compatible Engines & Equipment
- Cummins QSF2.8
- Cummins QSF3.8
- Cummins QSB4.5
Note: This filter platform is also broadly cross-referenced for the wider Cummins QSL9, QSC, QSL, QSB, QSBT3 and QSBT4 engine family across various third-party listings. Confirm your specific engine model and air housing configuration (AH55522/AH55562/AH55563/AH55564) before ordering.
AF55015 Cross Reference / OE Replacement Numbers
The AF55015 air filter is a direct cross reference and replacement for the following OE and aftermarket part numbers:
| Brand / Source | Part Number |
|---|---|
| Fleetguard/Cummins Filtration | AF55015 |
| Cummins OE | 5261250 |
| FRAM | CA7100 |
Note: AF55015 is the primary element used together with Fleetguard’s AF55309 secondary safety element, and is the filter element fitted inside air housings AH55522, AH55562, AH55563, AH55564, AH55676 and AK55723. Confirm your specific housing model before ordering a replacement set.
Why Choose IXIN’s AF55015 Air Filter
- Two-Stage System Compatibility — Designed to pair with the AF55309 secondary safety element, providing complete two-stage intake filtration for Cummins QSF/QSB engines.
- Broad Engine Platform Coverage — Cross-referenced across the QSF2.8/QSF3.8/QSB4.5 platform as well as the wider QSL9/QSC/QSL/QSB/QSBT3/QSBT4 family, useful for distributors standardizing air filter inventory.
- OEM-Equivalent Fit — Manufactured to match OE dimensions for the AF55015, supporting drop-in compatibility with the compatible air housing range.
- Factory-Direct Supply — As a manufacturer (not a trading company), IXIN offers stable lead times and customization options for private label, packaging and media specification.
- Bulk & OEM Pricing — Volume discounts available for distributors and equipment dealers. For guidance on verifying cross reference numbers before a bulk order, see our fuel filter cross reference guide — the same verification principles apply across air, fuel and hydraulic filter categories.
Installation & Maintenance Notes
For Cummins QSF/QSB engines using the AF55015 air filter, general service steps include:
- Shut down the engine and allow the air intake system to cool before servicing.
- Open the air filter housing and remove the old primary element (AF55015) first.
- Inspect the secondary element (AF55309) — replace it every 2–3 primary element changes, or immediately if visibly contaminated, and never clean/reuse it.
- Inspect the housing for dust buildup or debris before installing new elements.
- Install the new filter(s), ensuring the seal seats evenly to prevent unfiltered air bypass, and secure the housing cover.
- Watch for warning signs like reduced engine power, sluggish acceleration, or increased fuel consumption, which can indicate a restricted filter.
FAQ
Q: Do I need to replace both AF55015 and AF55309 at the same time? A: Not necessarily. The primary element (AF55015) is serviced more frequently based on restriction indicators or visible contamination, while the secondary element (AF55309) is typically replaced less often unless it becomes visibly dirty or damaged.
Q: Is the AF55015 compatible with all the listed Cummins engines? A: The AF55015 fits Cummins QSF2.8, QSF3.8 and QSB4.5 engines, and is also cross-referenced for the broader QSL9/QSC/QSL/QSB/QSBT3/QSBT4 family. Confirm your specific engine model and air housing configuration before ordering.
Q: What’s the difference between IXIN’s AF55015 and the OEM Fleetguard filter? A: IXIN manufactures this filter to match OEM dimensions. The main difference is price and lead time — IXIN offers factory-direct pricing for bulk and OEM orders without compromising fit or filtration performance.
Q: Can I order the AF55015 with custom packaging or private label? A: Yes. IXIN supports customized packaging, labeling and media specifications for distributors and private-label buyers. Contact our sales team with your requirements.
Q: What is the minimum order quantity (MOQ)? A: MOQ varies by customization level. Get in touch with us via WhatsApp or email for current MOQ and lead time on the AF55015 air filter.
