HomeAir and Fuel Delivery > FiltersBaldwin PA631 Air Filter
Part #: PA631

Baldwin PA631 Air Filter

⚙️ 39 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick, Pontiac, Chevrolet, Cadillac, and Oldsmobile, Electra, Gran Sport, Riviera, Wildcat, Bonneville, Catalina, Grand Prix, Star Chief, Bel Air, Biscayne, Impala, LeMans, Ventura, DeVille, Eldorado, Series 60 Fleetwood, Series 62, Series 75 Fleetwood, Fiesta, and Super Chief
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Overview of Baldwin PA631 Engine Air Filter

The Baldwin PA631 engine air filter is designed for reliable air filtration in select Buick, Cadillac, Chevrolet, and Pontiac vehicles. Engineered to meet OEM specifications, this filter supports optimal engine performance by maintaining clean airflow.

  • Compatible with Buick, Cadillac, Chevrolet, and Pontiac models including Bel Air, Bonneville, Catalina, DeVille, Eldorado, Grand Prix, Impala, LeMans, and Riviera
  • Dimensions: Height 2 3/16 inches (55.6 mm)
  • Inside Diameter: 14 15/16 inches (379.4 mm)
  • Outside Diameters: 17 5/16 inches (439.7 mm) and 18 5/16 inches (465.1 mm)
  • Flange type design for secure fitment
  • Replaces GMC part number 6421030

Detailed Product Description

The Baldwin PA631 engine air filter is specifically designed to provide effective filtration for air entering the engine intake system. Its precise dimensions, including a height of 2 3/16 inches and dual outside diameters, ensure a proper seal and fit within the air intake housing. The flange design aids in secure installation and prevents unfiltered air bypass. This filter is compatible with a range of classic and modern vehicles from Buick, Cadillac, Chevrolet, and Pontiac, such as the Chevrolet Impala and Pontiac Grand Prix, making it a suitable replacement for the original equipment filter.

Applications and Problem Solving

  • Prevents engine damage caused by dust and debris entering the intake system
  • Helps maintain engine efficiency by ensuring clean airflow
  • Reduces the risk of clogged fuel injectors and spark plugs
  • Supports consistent engine performance and fuel economy
  • Replaces worn or damaged air filters to restore proper filtration

Installation Notes and Tips

  • Verify compatibility with your vehicle’s make and model before installation
  • Ensure the flange seats properly to avoid air leaks
  • Inspect the air filter housing for debris before installing the new filter
  • Replace the filter at regular service intervals as recommended by the vehicle manufacturer

Quality Assurance and Warranty

Baldwin filters are manufactured to meet industry standards for filtration efficiency and durability. The PA631 engine air filter is built to provide consistent performance under normal operating conditions. While specific warranty details may vary, Baldwin typically offers coverage against manufacturing defects. Consult product documentation or authorized sources for exact warranty terms.

BrandBaldwin
Part NumberPA631
Fits"Buick, Cadillac, Chevrolet, Oldsmobile, Pontiac Automotive"
Height2 3/16
Height (mm)55.6
Inside Diameter 114 15/16
Inside Diameter 1 (mm)379.4
Outside Diameter 117 5/16
Outside Diameter 1 (mm)439.7
Outside Diameter 218 5/16
Outside Diameter 2 (mm)465.1
Remark 1Flange
ReplacesGMC 6421030

This part fits 39 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1965BuickRiviera6.6LV8N/A18 5/16 Inch Outer Diameter
1965BuickRiviera7.0LV8N/A18 5/16 Inch Outer Diameter
1965PontiacBonneville6.4LV8N/A18 5/16 Inch Outer Diameter
1965PontiacBonneville6.9LV8N/A18 5/16 Inch Outer Diameter
1965PontiacCatalina6.4LV8N/A18 5/16 Inch Outer Diameter
1965PontiacCatalina6.9LV8N/A
1965PontiacGrand Prix6.4LV8N/A18 5/16 Inch Outer Diameter
1965PontiacGrand Prix6.9LV8N/A18 5/16 Inch Outer Diameter
1964ChevroletBel Air6.7LV8N/A18 5/16 Inch Outer Diameter
1964ChevroletImpala6.7LV8N/A18 5/16 Inch Outer Diameter
1964PontiacBonneville6.9LV8N/A
1964PontiacCatalina6.9LV8N/A
1964PontiacGrand Prix6.9LV8N/A
1963ChevroletBel Air6.7LV8N/A18 5/16 Inch Outer Diameter
1963ChevroletImpala6.7LV8N/A18 5/16 Inch Outer Diameter
1963PontiacBonneville6.4LV8N/A
1963PontiacBonneville6.9LV8N/A18 5/16 Inch Outer Diameter
1963PontiacCatalina6.4LV8N/A
1963PontiacCatalina6.9LV8N/A
1963PontiacGrand Prix6.4LV8N/A
1963PontiacGrand Prix6.9LV8N/A
1963PontiacLeMans5.3LV8N/A
1962PontiacBonneville6.4LV8N/A18 5/16 Inch Outer Diameter
1962PontiacCatalina6.4LV8N/A
1962PontiacGrand Prix6.4LV8N/A
1961ChevroletBel Air5.7LV8N/A18 5/16 Inch Outer Diameter
1961PontiacBonneville6.4LV8N/A18 5/16 Inch Outer Diameter
1961PontiacCatalina6.4LV8N/A
1960CadillacDeVille6.4LV8N/A
1960CadillacEldorado6.4LV8N/A
1960ChevroletBel Air5.7LV8N/A18 5/16 Inch Outer Diameter
1960ChevroletImpala5.7LV8N/A18 5/16 Inch Outer Diameter
1960PontiacBonneville6.4LV8N/A18 5/16 Inch Outer Diameter
1960PontiacCatalina6.4LV8N/A
1959CadillacDeVille6.4LV8N/A
1959CadillacEldorado6.4LV8N/A
1959PontiacBonneville6.4LV8N/A18 5/16 Inch Outer Diameter
1959PontiacCatalina6.4LV8N/A
1958CadillacEldorado6.0LV8N/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:

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