WIX 51040MP vs Baldwin B43-S: Oil Filter Compatibility
Compare WIX 51040MP and Baldwin B43-S 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 M18x1.5 thread.
Quick verdict
Both use a M18x1.5 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.
WIX 51040MP and Baldwin B43-S specifications
How matching is scored| Specification | WIX 51040MP | Baldwin B43-S |
|---|---|---|
| Thread size | M18x1.5 | M18x1.5 |
| Gasket OD | 69.44 mm | 69.9 mm |
| Gasket ID | 61.72 mm | 60.9 mm |
| Can OD | 74.19 mm | 73.8 mm |
| Height | 87.63 mm | 88.9 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M18x1.5.
Gasket OD differs by 0.5 mm (WIX 51040MP: 69.44 mm, Baldwin B43-S: 69.9 mm).
Gasket ID differs by 0.8 mm (WIX 51040MP: 61.72 mm, Baldwin B43-S: 60.9 mm).
Baldwin B43-S is 1.3 mm taller (WIX 51040MP: 87.63 mm, Baldwin B43-S: 88.9 mm) -- check clearance before substituting.
Can OD differs by 0.4 mm (WIX 51040MP: 74.19 mm, Baldwin B43-S: 73.8 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.