PA3978Photo not yet available

BALDWIN · Engine Air Filter

PA3978

Air Element

Call for price
Call either store for your current price.
Belleville APCCall for availability
Kingston APCCall for availability

Stock checked September 11, 12:46 PM Eastern. Call before travelling so we can confirm what is still available.

Call Belleville ↗Call Kingston ↗Text your part number ↗

THE DETAILS THAT MATTER

FILTER SPECIFICATIONS.

Filter type
Air Element
Outside diameter
12 3/32 in.
Outside diameter (mm)
307.2
Inside diameter
13/32 in.
Length
15 15/32 in.
Length (mm)
392.9
Manufacturer part number
PA3978
GTIN
00791440060265

Baldwin replacement references: Sullair 405158, 405158S

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 PA3978. Keep any size, quantity or application conditions with the match. A cross-reference alone does not confirm fit on your equipment.

16 manufacturer reference rows

Brand / manufacturerReference numberCondition / noteReference qty
AIR MAZECD2040298261
AIR REFINERARM4051581
BALDWIN FILTERSPA39781
BIG A FILTER938581
CARQUEST878581
GRAINGER4XDJ71
HASTINGSPA39781
KRALINATORLA13081
LUBER-FINERLAF87251
NAPA GOLD28581
NELSON70096N1
SULLAIR4051581
SULLAIR405158S1
WIX428581
WIX5428581
WOODGATEWGA15061

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.

Sullair Compressors

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.