Baldwin B421 Oil Filter Cross Reference
Use this page to compare the Baldwin B421 with potentially compatible oil filters from other brands. Review thread size, gasket dimensions, overall height, and fitment notes before substituting. A cross reference is a research tool, not an automatic guarantee of fitment.
Before substituting: verify filter style, thread size or cartridge dimensions, gasket dimensions, height, clearance, bypass behavior, and application-specific requirements.
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Best equivalent matches
Select up to 4 filters, then click Compare to view their specs next to the searched filter.
8 compatible options
| Specification | Searched filter Baldwin B421 Reference filter | Purolator L14459Best Match Score: 93 SAFE | Score: 93 SAFE | Score: 91 SAFE | Score: 91 SAFE |
|---|---|---|---|---|---|
| Thread size | M20x1.5 | M20x1.5 | M20x1.5 | M20x1.5 | M20x1.5 |
| Gasket OD | 64 mm | 63 mm | 63 mm | 64 mm | 62.7 mm |
| Gasket ID | 54.1 mm | 55.1 mm | 55.1 mm | 54.1 mm | 54.6 mm |
| Can OD | 76.2 mm | 80.01 mm | 80.01 mm | 76.2 mm | 74.68 mm |
| Height | 72.2 mm | 74.93 mm | 74.93 mm | 72.2 mm | 78.99 mm |
| Internal bypass valve | Yes | Yes | Yes | Yes | Yes |
| Bypass PSID | 14 | 12 - 15 | 12 - 15 | 8 | 14 |
| Anti-drainback valve | Yes | Yes | Yes | Yes | Yes |
| ID top | Unknown | Unknown | Unknown | Unknown | Unknown |
| ID bottom | Unknown | Unknown | Unknown | Unknown | Unknown |
Other suitable matches
Large gasket OD variation · Large gasket ID variation
Large gasket OD variation · Large gasket ID variation
Related compatible filter pages
Frequently asked questions
What replaces Baldwin B421?
Several oil filter alternatives may be compatible with Baldwin B421, but you should always verify thread dimensions, gasket sealing dimensions, bypass behavior, anti-drainback valve requirements, and installation clearance before substituting.
How do I confirm a cross reference for Baldwin B421?
Compare thread size, thread pitch, gasket outside diameter, gasket inside diameter, can height, bypass pressure range, and anti-drainback valve requirements before using a substitute.
Can I use a different-size oil filter instead of Baldwin B421?
Sometimes, but only if thread compatibility, gasket seating, bypass behavior, and physical clearance are all acceptable for the application.