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BALDWIN · Engine Air Filter

RS3991

Radial Seal Inner Air Element

$100.98
Dealer price · CAD per each · price checked September 11, 2026
Belleville APCCall for availability
Kingston APCCall for availability

Stock checked September 11, 1:46 PM Eastern. Call before travelling so we can confirm what is still available.

THE DETAILS THAT MATTER

FILTER SPECIFICATIONS.

Filter type
Radial Seal Inner Air Element
Outside diameter
2 7/32 in.
Outside diameter (mm)
56.4
Inside diameter
1 5/8 in.
Length
9 13/32 in.
Length (mm)
238.9
Manufacturer part number
RS3991
GTIN
00791440061026

Baldwin replacement references: KHD 1180868

Baldwin PIES August 20, 2026 · Baldwin Product Guide July 24, 2026.

START WITH THE NUMBER YOU HAVE

CROSS-REFERENCE NUMBERS.

Baldwin’s reference lists the numbers below for RS3991. Keep any size, quantity or application conditions with the match. A cross-reference alone does not confirm fit on your equipment.

47 manufacturer reference rows

Brand / manufacturerReference numberCondition / noteReference qty
ATLAS COPCO1615712601Inner, Filter O1
ATLAS COPCO29149301001
BALDWIN FILTERSRS39911
CARQUEST839681
CLARCOR UKE29132B1
DONALDSONP7800181
FLEETGUARDAF257261
FLEETGUARDAF263881
FLEETRITEAFR8257261
GPCFC8131
GRAINGER4ZGG71
GREYFRIARS1577A1
HAKO682421
HASTINGSRS39911
HENGSTE1500LS1
JCB (J.C. BAMFORD)329260601
JURA (HIFI)SA170851
KAESER6352601
KHD (KLOCKNER, HUMBOLT, DEUTZ)11808681
KUBOTAK3181822501
KUBOTAK3181822511
LUBER-FINERLAF57491
MANN+HUMMEL4410092911Inner, Filter O1
MANN+HUMMEL4410092921Inner, Filter O1
MANN+HUMMEL4410092941Inner, Filter O1
MANN+HUMMEL4410092951Inner, Filter O1
MANN+HUMMEL45100551091
MANN+HUMMEL4510092911Inner, Filter O1
MANN+HUMMELCF1001
MEGAFIL FILTROSVRA1121
NAPA GOLD99681
SANDVIK550717911
SANDVIK897321191
SCHAEFF55016609481
SF-FILTER / SCHUPPSL83851
SF-FILTER / SCHUPPSL838521
UNIFLUXXA18131
VIRGIS FILTERST168771
VOLVO80804821
VOLVO808048421
VOLVO808583921
VOLVOVOE80804821
VOLVOVOE808048421
WIRTGEN21270691
WIX499681
WIX5499681
WOODGATEWGA1227S1

Source: Baldwin Specs & Interchange · July 27, 2026. Reference quantity is part of the manufacturer’s cross-reference, not store stock.

CHECK THE EQUIPMENT. CHECK THE ENGINE.

APPLICATIONS & EQUIPMENT.

Kubota Engines

Baldwin Product Guide summary. This description does not establish fit for every model from each manufacturer.

Call with your equipment model, engine and the number on the existing filter. Our counter will help verify the application.

A REAL COUNTER. CLOSE TO HOME.

YOUR LOCAL FILTER PEOPLE.

Bring the number off your old filter, or your equipment and engine details. We’ll help check the match.