Baldwin BT389 vs Baldwin B49: Oil Filter Compatibility
Compare Baldwin BT389 and Baldwin B49 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 11/2-16 thread.
Quick verdict
Closest known dimensional difference: height +12.7 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 BT389 and Baldwin B49 specifications
How matching is scored| Specification | Baldwin BT389 | Baldwin B49 |
|---|---|---|
| Thread size | 11/2-16 | 11/2-16 |
| Gasket OD | 110.3 mm | 110 mm |
| Gasket ID | 98.4 mm | 98 mm |
| Can OD | 128.6 mm | 118.3 mm |
| Height | 273.1 mm | 285.8 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 11/2-16.
Gasket OD differs by 0.3 mm (Baldwin BT389: 110.3 mm, Baldwin B49: 110 mm).
Gasket ID differs by 0.4 mm (Baldwin BT389: 98.4 mm, Baldwin B49: 98 mm).
Baldwin B49 is 12.7 mm taller (Baldwin BT389: 273.1 mm, Baldwin B49: 285.8 mm) -- check clearance before substituting.
Can OD differs by 10.3 mm (Baldwin BT389: 128.6 mm, Baldwin B49: 118.3 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.