How do I confirm pilotpart437317 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Air Filter 131-8821 for Caterpillar CAT Excavator 320B 320C 320D 321B 321C 322B 323D 325B

For Caterpillar Air Filter

Air Filter 131-8821 for Caterpillar 321D LCR

Q: What part numbers are associated with this Air Filter?

131-8821, CA1318821, CA131-8822, 131-8822, 320C, 320D, 320D2, 320E, 321B, 321C, 322C

OEM / REF: 131-8821SKU: pilotpart437317

Air Filter 131-8821 for Caterpillar CAT Excavator 320B 320C 320D 321B 321C 322B 323D 325B is a Air Filter replacement part indexed for Caterpillar 321D LCR and Caterpillar 320B, with 3 application records on file. Match OEM part number 131-8821 and confirm fitment for Caterpillar Seals, Filters & Maintenance Parts b...

Stock: In stock
Condition: New
Fitment: Caterpillar Seals, Filters & Maintenance Parts
Category: Air Filter

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$103.99USD/EA

~~$14,799.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 22 – Oct 29
10	Oct 20 – Oct 27
50	Oct 18 – Oct 25

Estimates from today; confirm exact lead time before payment.

Quantity

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Air Filter Description

This Air Filter is indexed for Caterpillar 321D LCR; Caterpillar 320B; Caterpillar 320B FM LL; Caterpillar 320B L. Compare reference number 131-8821 against the label on your existing Caterpillar component before ordering.

Additional cross references on file: CA1318821, CA131-8822, 131-8822. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

131-8821 CA1318821 CA131-8822 131-8822320C320D320D2320E321B321C322C

Applications

Caterpillar 321D LCR
Caterpillar 320B
Caterpillar 320B FM LL
Caterpillar 320B L
Caterpillar 320B LL
Caterpillar 320B LU
Caterpillar 320B N
Caterpillar 320B S
Caterpillar 320B U
Caterpillar 320C
Caterpillar 320C FM
Caterpillar 320C L
Caterpillar 320D
Caterpillar 320D FM
Caterpillar 320D FM RR
Caterpillar 320D GC
Caterpillar 320D L
Caterpillar 320D LN
Caterpillar 320D LRR
Caterpillar 320D RR
Caterpillar 320D2
Caterpillar 320D2 FM
Caterpillar 320D2 GC
Caterpillar 320D2 L
Caterpillar 320D3
Caterpillar 320D3 GC
Caterpillar 320E
Caterpillar 320E L
Caterpillar 320E LN
Caterpillar 320E LRR
Caterpillar 320E RR
Caterpillar 320F L
Caterpillar 321B
Caterpillar 321C
Caterpillar 322B
Caterpillar 322B L
Caterpillar 322B LN
Caterpillar 322C
Caterpillar 322C FM
Caterpillar 323D
Caterpillar 323D L
Caterpillar 323D LN
Caterpillar 323D S
Caterpillar 323D SA
Caterpillar 323D2 L
Caterpillar 323D3
Caterpillar 323E L
Caterpillar 323E LN
Caterpillar 323E SA
Caterpillar 323F
Caterpillar 323F L
Caterpillar 323F LN
Caterpillar 323F OEM
Caterpillar 323F SA
Caterpillar 325B
Caterpillar 325B L
Caterpillar 325B LN
Caterpillar M325B
Caterpillar CP-533D
Caterpillar CP-563D
Caterpillar CP-563E
Caterpillar CP-573E
Caterpillar CP-663E
Caterpillar CS-531D
Caterpillar CS-533D
Caterpillar CS-563D
Caterpillar CS-563E
Caterpillar CS-573D
Caterpillar CS-573E
Caterpillar CS-583D
Caterpillar CS-583E
Caterpillar CS-663E
Caterpillar CS-683E
Caterpillar s: Fit for follwing models: CATERPILLAR EXCAVATOR: 320B, 320B L, 320B U, 320C, 320C FM, 320C L, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 321B, 321C, 321D LCR, 322B L, 322B LN, 322C, 322C FM, 323D L, 323D LN, 323D SA, 323D2 L, 323E L, 325B, 325B L CATERPILLAR MOBILE HYD POWER UNIT: 323D L, 323D LN CATERPILLAR VIBRATORY COMPACTOR: CP-573E, CP-663E, CS-531D, CS-533D, CS-563D, CS-563E, CS-573D, CS-583D, CS-583E, CS-663E, CS-683E CATERPILLAR WHEELED EXCAVATOR: M325B

Specifications

Part Number	131-8821, 1318821, CA1318821

Fitment Notes

Brand or application signal: Caterpillar Seals, Filters & Maintenance Parts
Product family: Air Filter
System category: Seals, Filters & Maintenance Parts > Filters > Air Filter
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.