Baldwin B173-S vs K&N HP-2001: Oil Filter Compatibility
Compare Baldwin B173-S and K&N HP-2001 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 M20x1.5 thread.
Quick verdict
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 B173-S and K&N HP-2001 specifications
How matching is scored| Specification | Baldwin B173-S | K&N HP-2001 |
|---|---|---|
| Thread size | M20x1.5 | M20x1.5 |
| Gasket OD | 71.4 mm | 71 mm |
| Gasket ID | 62.7 mm | 62 mm |
| Can OD | 93.7 mm | 93 mm |
| Height | 82.6 mm | 95 mm |
| Internal bypass valve | Yes | Unknown |
| Bypass PSID | 20 | Unknown |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are M20x1.5.
Gasket OD differs by 0.4 mm (Baldwin B173-S: 71.4 mm, K&N HP-2001: 71 mm).
Gasket ID differs by 0.7 mm (Baldwin B173-S: 62.7 mm, K&N HP-2001: 62 mm).
K&N HP-2001 is 12.4 mm taller (Baldwin B173-S: 82.6 mm, K&N HP-2001: 95 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (Baldwin B173-S: 93.7 mm, K&N HP-2001: 93 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.