Baldwin B404 vs WIX 51641: Oil Filter Compatibility
Compare Baldwin B404 and WIX 51641 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 3/4-16 thread.
Quick verdict
Both use a 3/4-16 thread.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Baldwin B404 and WIX 51641 specifications
How matching is scored| Specification | Baldwin B404 | WIX 51641 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.4 mm | 71.98 mm |
| Gasket ID | 62.7 mm | 62.53 mm |
| Can OD | 118.3 mm | 108.6 mm |
| Height | 158.8 mm | 167.7 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | Unknown |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 0.6 mm (Baldwin B404: 71.4 mm, WIX 51641: 71.98 mm).
Gasket ID differs by 0.2 mm (Baldwin B404: 62.7 mm, WIX 51641: 62.53 mm).
WIX 51641 is 8.9 mm taller (Baldwin B404: 158.8 mm, WIX 51641: 167.7 mm) -- check clearance before substituting.
Can OD differs by 9.7 mm (Baldwin B404: 118.3 mm, WIX 51641: 108.6 mm).
Bypass valve presence differs: WIX 51641 has one, Baldwin B404 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.