Fleetguard AF321 cross reference

Baldwin lists PA1633 as the replacement for AF321.

Source: Baldwin Manufacturers' Cross-Reference, Form 560-24 (2024). AF321 is newer than Fleetguard's last published cross-reference index (2012), so no Fleetguard-published crosses are shown.

Upgrade chains run one way: equipment spec'd with a newer filter number should not step back to the older one. Go by what the truck was spec'd with.

Always verify against the current OEM catalog before ordering. Cross references are a starting point, not a guarantee of fit.

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