Baldwin BT349 vs WIX 51825: Oil Filter Compatibility
Compare Baldwin BT349 and WIX 51825 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 1-12 thread.
Quick verdict
Closest known dimensional difference: height -11.3 mm. Verify application-specific requirements before substituting.
- 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 BT349 and WIX 51825 specifications
How matching is scored| Specification | Baldwin BT349 | WIX 51825 |
|---|---|---|
| Thread size | 1-12 | 1-12 |
| Gasket OD | 71.4 mm | 71.98 mm |
| Gasket ID | 62.7 mm | 62.53 mm |
| Can OD | 108 mm | 93.22 mm |
| Height | 231.8 mm | 220.5 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 20 | 13 - 19 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 1-12.
Gasket OD differs by 0.6 mm (Baldwin BT349: 71.4 mm, WIX 51825: 71.98 mm).
Gasket ID differs by 0.2 mm (Baldwin BT349: 62.7 mm, WIX 51825: 62.53 mm).
Baldwin BT349 is 11.3 mm taller (Baldwin BT349: 231.8 mm, WIX 51825: 220.5 mm) -- check clearance before substituting.
Can OD differs by 14.8 mm (Baldwin BT349: 108 mm, WIX 51825: 93.22 mm).
Both open their bypass valve in a comparable range: Baldwin BT349 at 20-20 psi, WIX 51825 at 13-19 psi -- these ranges do not overlap.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.