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Walker 31900 Exhaust FlangeOE Quality 60-Day Returns
Part #: 31900

Walker 31900 Exhaust Flange

55 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Oldsmobile, Chevrolet, GMC, Pontiac, Buick, and Cadillac, Cutlass Salon, Cutlass Supreme, El Camino, Monte Carlo, Caballero, Cutlass Calais, Bonneville, Grand Prix, Regal, Malibu, Cutlass Cruiser, Century, Electra, Estate Wagon, LeSabre, DeVille, Fleetwood, Caprice, Impala, 98, Custom Cruiser, Delta 88, Catalina, Laurentian, Parisienne, and Cutlass
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Walker 31900 Exhaust Flange Overview

Walker 31900 is a steel 3-bolt exhaust flange built for OE-style exhaust repairs where a secure, accurate connection is needed. With a 2.5-inch inside diameter and natural finish, it supports replacement work on a wide range of domestic GM and Pontiac applications, including Chevrolet Monte Carlo, Oldsmobile Cutlass Supreme, and Pontiac Grand Prix models.

  • Steel construction for exhaust system durability
  • 2.5-inch inside diameter for matching exhaust pipe connections
  • 3-bolt flange design for a secure exhaust joint
  • 3.625-inch bolt hole center-to-center spacing
  • 3.75-inch flange length and 4.125-inch flange width
  • 0.25-inch flange thickness for a solid mounting surface
  • Natural finish

OE-Style Fit and Application Details

Walker 31900 is engineered for replacement exhaust work that calls for OE-style fit, appearance, and dependable sealing at the flange connection. Walker’s OE partnerships and emissions-control manufacturing background support consistent replacement part quality across domestic and import vehicle applications. This part cross-references Anchor 8034 and 9173 for the same application.

Fits 1985 Oldsmobile Cutlass Salon, N/A. Fits 1979 Oldsmobile Cutlass Salon, N/A. Fits 1982-1985 Oldsmobile Cutlass Supreme, N/A. Fits 1979 Oldsmobile Cutlass Supreme, N/A. Fits 1983-1984 Chevrolet El Camino, N/A. Fits 1982-1984 Chevrolet Monte Carlo, N/A. Fits 1982-1984 Oldsmobile Cutlass Calais, N/A. Fits 1979 Oldsmobile Cutlass Calais, N/A. Fits 1980-1984 Pontiac Bonneville, N/A. Fits 1981-1984 Pontiac Grand Prix, N/A. Fits 1981-1983 Buick Regal, N/A. Fits 1982-1983 Chevrolet Malibu, N/A. Fits 1982-1983 Oldsmobile Cutlass Cruiser, N/A. Fits 1981 Buick Century, N/A. Fits 1980 Buick LeSabre, N/A. Fits 1979-1980 Cadillac DeVille, N/A. Fits 1979-1980 Cadillac Fleetwood, N/A. Fits 1980 Chevrolet Caprice, N/A. Fits 1980 Chevrolet Impala, N/A. Fits 1978-1980 Oldsmobile 98, N/A. Fits 1978-1980 Oldsmobile Custom Cruiser, N/A. Fits 1978-1980 Oldsmobile Delta 88, N/A. Fits 1980 Pontiac Catalina, N/A. Fits 1980 Pontiac Laurentian, N/A. Fits 1980 Pontiac Parisienne, N/A. Fits 1979 Oldsmobile Cutlass, N/A.

Common Repair Uses

  • Replacing a rusted or warped exhaust flange
  • Restoring a leaking exhaust joint at the pipe connection
  • Repairing a damaged 3-bolt flange on a GM exhaust system
  • Matching a 2.5-inch exhaust connection during exhaust service
  • Supporting exhaust system reassembly after component replacement

Installation Notes and Quality

Verify the 2.5-inch inside diameter, 3-bolt pattern, and bolt hole spacing before installation to confirm alignment with the existing exhaust components. Check flange mating surfaces for corrosion, distortion, or carbon buildup so the connection can seat properly. Walker’s emissions-control manufacturing focus and OE-style replacement approach support consistent fitment and dependable service in exhaust repair applications.

BrandWalker
Part Number31900
Bolt Hole Center To Bolt Hole Center3.625
FinishNatural
Flange Length3.75
Flange Thickness0.25
Flange Type3 Bolt
Flange Width4.125
Inside Diameter2.5
MaterialSteel

This part fits 55 vehicles. Search below:

YearMakeModelSubmodelBody TypeDrive TypeLitersCylindersFuel TypePositionNotes
1985OldsmobileCutlass SalonBaseRWD5.7LV8N/A
1985OldsmobileCutlass SupremeBaseRWD5.7LV8N/A
1984ChevroletEl Camino5.7LV8N/A
1984ChevroletMonte CarloBase5.7LV8N/A
1984OldsmobileCutlass CalaisRWD5.7LV8N/A
1984OldsmobileCutlass SupremeRWD5.7LV8N/A
1984PontiacBonnevilleRWD5.7LV8N/A
1984PontiacGrand Prix5.7LV8N/A
1983BuickRegalRWD5.7LV8N/A
1983ChevroletEl Camino5.7LV8N/A
1983ChevroletMalibu5.7LV8N/A
1983ChevroletMonte Carlo5.7LV8N/A
1983OldsmobileCutlass CalaisRWD5.7LV8N/A
1983OldsmobileCutlass CruiserRWD5.7LV8N/A
1983OldsmobileCutlass SupremeRWD5.7LV8N/A
1983PontiacBonnevilleRWD5.7LV8N/A
1983PontiacGrand Prix5.7LV8N/A
1982BuickRegalRWD5.7LV8N/A
1982ChevroletMalibu5.7LV8N/A
1982ChevroletMonte Carlo5.7LV8N/A
1982OldsmobileCutlass CalaisRWD5.7LV8N/A
1982OldsmobileCutlass CruiserRWD5.7LV8N/A
1982OldsmobileCutlass SupremeRWD5.7LV8N/A
1982PontiacBonnevilleRWD5.7LV8N/A
1982PontiacGrand Prix5.7LV8N/A
1981BuickCenturyRWD5.7LV8N/A
1981BuickRegalRWD5.7LV8N/A
1981PontiacBonnevilleRWD5.7LV8N/A
1981PontiacGrand Prix5.7LV8N/A
1980BuickLeSabreLimited5.7LV8DIESELN/A
1980BuickLeSabreBase5.7LV8DIESELN/A
1980CadillacDeVille5.7LV8N/A
1980CadillacFleetwood5.7LV8N/A
1980ChevroletCapriceWagon5.7LV8DIESELN/A
1980ChevroletImpalaWagon5.7LV8DIESELN/A
1980Oldsmobile985.7LV8DIESELN/A
1980OldsmobileCustom Cruiser5.7LV8DIESELN/A
1980OldsmobileDelta 885.7LV8N/A
1980PontiacBonneville5.7LV8DIESELN/A
1980PontiacCatalina5.7LV8DIESELN/A
1980PontiacLaurentian5.7LV8DIESELN/A
1980PontiacParisienne5.7LV8DIESELN/A
1979CadillacDeVille5.7LV8N/A
1979CadillacFleetwood5.7LV8N/A
1979Oldsmobile985.7LV8DIESELN/A
1979OldsmobileCustom Cruiser5.7LV8DIESELN/A
1979OldsmobileCutlass5.7LV8DIESELN/A
1979OldsmobileCutlass Calais4.3LV8DIESELN/A
1979OldsmobileCutlass Salon4.3LV8DIESELN/A
1979OldsmobileCutlass Supreme5.7LV8DIESELN/A
1979OldsmobileCutlass Supreme4.3LV8DIESELN/A
1979OldsmobileDelta 885.7LV8DIESELN/A
1978Oldsmobile985.7LV8DIESELN/A
1978OldsmobileCustom Cruiser5.7LV8DIESELN/A
1978OldsmobileDelta 885.7LV8DIESELN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

15328-180349173SF46061-001

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.