Baldwin B378 vs Baldwin BT526: Oil Filter Compatibility
Compare Baldwin B378 and Baldwin BT526 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 11/4-12 thread.
Quick verdict
COMPATIBLEMatch score: 81
Bypass presence unknown on one or both filters
- 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 B378 and Baldwin BT526 specifications
How matching is scored| Specification | Baldwin B378 | Baldwin BT526 |
|---|---|---|
| Thread size | 11/4-12 | 11/4-12 |
| Gasket OD | 71.4 mm | 71.4 mm |
| Gasket ID | 62.7 mm | 62.7 mm |
| Can OD | 93.7 mm | 93.7 mm |
| Height | 221.5 mm | 136.5 mm |
| Internal bypass valve | Unknown | No |
| Bypass PSID | Unknown | Not applicable |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 11/4-12.
Gasket OD is identical at 71.4 mm.
Gasket ID is identical at 62.7 mm.
Baldwin B378 is 85 mm taller (Baldwin B378: 221.5 mm, Baldwin BT526: 136.5 mm) -- check clearance before substituting.
Can OD is identical at 93.7 mm.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.