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Walker 31803 Exhaust Flange
| Brand | Walker 31803 |
|---|---|
| Finish | Natural |
| Flange Thickness | 0.39 |
| Flange Type | 3 Bolt |
| Material | Steel |
| Fits | Chevrolet, GMC, and Pontiac · 100 vehicles |
OE-style fit. Delivers dependable replacement performance with a natural steel flange.
3-bolt design. Provides a secure exhaust connection for straightforward installation.
Steel construction. Built for durable exhaust system service.
Cross-references Anchor 9177, AP Exhaust 8780 and 15002-1 for the same application. See all 11.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker 31803 Exhaust Flange for OE-Style Repair
Walker 31803 is a steel exhaust flange with a natural finish and a 3-bolt design for exhaust system service. It is built for direct replacement use where a durable flange connection is needed in single- and dual-exhaust applications on select Chevrolet and GMC vehicles.
Key Features
- Steel construction for exhaust connection strength
- Natural finish
- 3-bolt flange type
- Flange thickness: 0.39 in.
- OE-style replacement part for emissions and exhaust repair
Application Details
This Walker exhaust flange, part number 31803, is listed for a wide range of classic Chevrolet and GMC applications. It fits 1955-1966 Chevrolet Bel Air, with Single Exhaust; 1958 Chevrolet Bel Air, with Dual Exhaust; 1958-1966 Chevrolet Impala, with Single Exhaust; 1959-1964 Chevrolet Impala, with Dual Exhaust; 1959-1964 Chevrolet Bel Air, Except High Performance; 1959-1960 Chevrolet El Camino; 1965-1966 Chevrolet El Camino, with Single Exhaust; 1965-1966 Chevrolet Malibu, with Single Exhaust; 1966 Chevrolet Caprice, with Single Exhaust; 1967-1968 GMC G15/G1500 Van; and 1967-1968 GMC G25/G2500 Van. This part number 31803 is also cross-referenced to Anchor 9177 and AP Exhaust 8780 for the same application.
Common Repair Uses
- Replacing a rusted or warped exhaust flange
- Restoring a secure exhaust joint at the flange connection
- Repairing exhaust leaks at a 3-bolt flange interface
- Servicing single-exhaust and dual-exhaust systems on classic Chevrolet and GMC vehicles
- Addressing damaged mounting surfaces during exhaust system maintenance
Installation Notes and Tips
Verify flange style, bolt pattern, and thickness before installation. Match the vehicle’s exhaust configuration, including single or dual exhaust where noted in the fitment data. Inspect mating surfaces, fasteners, and adjoining exhaust components for wear or corrosion before assembly. Confirm fitment against the vehicle application list for Chevrolet Bel Air, Impala, El Camino, Malibu, Caprice, and GMC G15/G1500 or G25/G2500 Van models.
Quality Assurance
Walker supports replacement emissions control parts with OE-style fit, appearance, and dependability, backed by its OE-focused manufacturing and broad vehicle coverage. Part number 31803 is produced to meet the demands of exhaust system repair on domestic and import applications.
| Year | Make | Model | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1968 | GMC | G15/G1500 Van | — | 5.0L | V8 | N/A | — |
| 1968 | GMC | G25/G2500 Van | — | 5.0L | V8 | N/A | — |
| 1967 | GMC | G15/G1500 Van | — | 4.6L | V8 | N/A | — |
| 1967 | GMC | G15/G1500 Van | — | 5.4L | V8 | N/A | — |
| 1967 | GMC | G25/G2500 Van | — | 5.4L | V8 | N/A | — |
| 1967 | GMC | G25/G2500 Van | — | 4.6L | V8 | N/A | — |
| 1966 | Chevrolet | Bel Air | — | 6.5L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | Caprice | — | 6.5L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | Caprice | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | El Camino | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | Impala | — | 6.5L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | Impala | — | 5.4L | V8 | N/A | with Single Exhaust |
| 1966 | Chevrolet | Malibu | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1965 | Chevrolet | Bel Air | — | 6.5L | V8 | N/A | with Single Exhaust |
| 1965 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1965 | Chevrolet | El Camino | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1965 | Chevrolet | Impala | — | 6.5L | V8 | N/A | with Single Exhaust |
| 1965 | Chevrolet | Impala | — | 5.4L | V8 | N/A | with Single Exhaust |
| 1965 | Chevrolet | Malibu | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1964 | Chevrolet | Bel Air | — | 6.7L | V8 | N/A | Except High Performance |
| 1964 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | Except High Performance |
| 1964 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1964 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1964 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | Except High Performance |
| 1964 | Chevrolet | Impala | — | 5.4L | V8 | N/A | with Single Exhaust |
| 1964 | Chevrolet | Impala | — | 4.6L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1964 | Chevrolet | Impala | — | 6.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1964 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1964 | Chevrolet | Impala | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1964 | Chevrolet | Impala | — | 5.3L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1964 | Chevrolet | Impala | — | 6.7L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Bel Air | — | 6.7L | V8 | N/A | Except High Performance |
| 1963 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | Except High Performance |
| 1963 | Chevrolet | Bel Air | — | 7.0L | V8 | N/A | Except High Performance |
| 1963 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | Except High Performance |
| 1963 | Chevrolet | Bel Air | Sedan | 6.7L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Bel Air | Sedan | 7.0L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Impala | — | 6.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1963 | Chevrolet | Impala | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Impala | — | 5.3L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1963 | Chevrolet | Impala | — | 4.6L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1963 | Chevrolet | Impala | — | 7.0L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1963 | Chevrolet | Impala | — | 6.7L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1963 | Chevrolet | Impala | — | 7.0L | V8 | N/A | with Single Exhaust |
| 1962 | Chevrolet | Bel Air | — | 6.7L | V8 | N/A | Except High Performance |
| 1962 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | Except High Performance |
| 1962 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1962 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1962 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | Except High Performance |
| 1962 | Chevrolet | Impala | — | 6.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1962 | Chevrolet | Impala | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1962 | Chevrolet | Impala | — | 5.3L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1962 | Chevrolet | Impala | — | 4.6L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1962 | Chevrolet | Impala | — | 6.7L | V8 | N/A | with Single Exhaust |
| 1962 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1961 | Chevrolet | Bel Air | — | 6.7L | V8 | N/A | Except High Performance |
| 1961 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1961 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | Except High Performance |
| 1961 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | Except High Performance |
| 1961 | Chevrolet | Bel Air | — | 6.7L | V8 | N/A | with Single Exhaust |
| 1961 | Chevrolet | Impala | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1961 | Chevrolet | Impala | — | 6.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1961 | Chevrolet | Impala | — | 4.6L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1961 | Chevrolet | Impala | — | 5.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1961 | Chevrolet | Impala | — | 6.7L | V8 | N/A | with Single Exhaust |
| 1961 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1960 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1960 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | Except High Performance |
| 1960 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1960 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | Except High Performance |
| 1960 | Chevrolet | El Camino | — | 4.6L | V8 | N/A | — |
| 1960 | Chevrolet | El Camino | — | 5.7L | V8 | N/A | — |
| 1960 | Chevrolet | Impala | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1960 | Chevrolet | Impala | — | 5.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1960 | Chevrolet | Impala | — | 4.6L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1960 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1959 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | with Single Exhaust |
| 1959 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | Except High Performance |
| 1959 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1959 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | Except High Performance |
| 1959 | Chevrolet | Bel Air | — | 5.3L | V8 | N/A | Except High Performance |
| 1959 | Chevrolet | El Camino | — | 4.6L | V8 | N/A | — |
| 1959 | Chevrolet | El Camino | — | 5.7L | V8 | N/A | — |
| 1959 | Chevrolet | Impala | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1959 | Chevrolet | Impala | — | 5.7L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1959 | Chevrolet | Impala | — | 4.6L | V8 | N/A | Except High Performance; with Dual Exhaust |
| 1959 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1958 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1958 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Dual Exhaust |
| 1958 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1958 | Chevrolet | Bel Air | — | 5.7L | V8 | N/A | with Dual Exhaust |
| 1958 | Chevrolet | Impala | — | 5.7L | V8 | N/A | with Single Exhaust |
| 1958 | Chevrolet | Impala | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1957 | Chevrolet | Bel Air | — | 4.3L | V8 | N/A | with Single Exhaust |
| 1957 | Chevrolet | Bel Air | — | 4.6L | V8 | N/A | with Single Exhaust |
| 1956 | Chevrolet | Bel Air | — | 4.3L | V8 | N/A | with Single Exhaust |
| 1955 | Chevrolet | Bel Air | — | 4.3L | V8 | N/A | with Single Exhaust |
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