TRUST AF-773 is a round panel-style engine air filter
type: Unknown Type
Vendor: CorvairFarmer
Description:
🔍 Part Overview
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Part Number: AF-773
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Type: Round Panel Air Filter
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Dimensions:
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Outer Diameter: ~9.718 in (246.8 mm)
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Inner Diameter: ~8.187 in (208 mm)
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Height: ~2.826 in (71.8 mm)
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Material: Cellulose or synthetic media
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Gasket Material: Rubber
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Application Style: Drop-in OEM replacement
🚗 Vehicle Fitment
This filter fits a wide range of vehicles, including:
| Make | Model | Years |
|---|---|---|
| Chevrolet | S10, Astro, Lumina APV | 1994–1995 |
| GMC | Sonoma | 1994–1995 |
| Pontiac | Trans Sport | 1994–1995 |
| Nissan | Various models (OEM ref) | Early 1990s |
Fitment depends on engine type (typically 3.1L or 4.3L V6) and air box configuration. Always confirm with VIN or OEM specs.
🔁 Cross-Reference Numbers
| Brand | Equivalent Part Numbers |
|---|---|
| TRUST | AF-773 |
| Champ | AF-773 |
| AC Delco | A3916C |
| Fram | CA3916 |
| Wix | 42191 |
| Purolator | A25691 |
| Baldwin | PA22191 |
| Nissan OEM | 1654589W00, 1654689W00 |
| GM OEM | 25040929, 25050385 |
These filters match in size and filtration rating, though media type and construction may vary slightly.
🛠️ Installation Tips
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Clean the air box before installing
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Ensure proper seal to prevent air leaks
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Replace every 12,000–15,000 miles or based on driving conditions
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Store unused filters in a dry, dust-free environment
