WIX 51825 vs Baldwin BT349: Oil Filter Compatibility
Compare WIX 51825 and Baldwin BT349 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.
WIX 51825 and Baldwin BT349 specifications
How matching is scored| Specification | WIX 51825 | Baldwin BT349 |
|---|---|---|
| Thread size | 1-12 | 1-12 |
| Gasket OD | 71.98 mm | 71.4 mm |
| Gasket ID | 62.53 mm | 62.7 mm |
| Can OD | 93.22 mm | 108 mm |
| Height | 220.5 mm | 231.8 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 13 - 19 | 20 |
| 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 (WIX 51825: 71.98 mm, Baldwin BT349: 71.4 mm).
Gasket ID differs by 0.2 mm (WIX 51825: 62.53 mm, Baldwin BT349: 62.7 mm).
Baldwin BT349 is 11.3 mm taller (WIX 51825: 220.5 mm, Baldwin BT349: 231.8 mm) -- check clearance before substituting.
Can OD differs by 14.8 mm (WIX 51825: 93.22 mm, Baldwin BT349: 108 mm).
Both open their bypass valve in a comparable range: WIX 51825 at 13-19 psi, Baldwin BT349 at 20-20 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.