Size Chart
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ACL 4B1925H-.025 is a connecting-rod bearing set for the cataloged Honda B18C1, B18C2, B18C5, B18C7 engine configurations. .025 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.
H identifies the ACL Race Series family. Match the complete suffix to the required clearance, shell width and locating features.
ACL’s 2023 guide lists the 4B1925 rod-bearing family for B18C1, B18C2, B18C5 and B18C7 1797cc VTEC engines with 5M1959 main bearings. It separately catalogs 4B1946 for B17A1/B18A1/B18B1/B18B2. Match the complete engine code and rod configuration rather than selecting by the B18 name alone.
| Manufacturer / Engine | Honda — B18C1 |
|---|---|
| Manufacturer / Engine | Honda — B18C2 |
| Manufacturer / Engine | Honda — B18C5 |
| Manufacturer / Engine | Honda — B18C7 |
The engine-family list identifies catalog applications, not universal vehicle fitment. Confirm the exact engine version, crankshaft, rods, block and bearing location. Vehicle names and photos do not replace dimensional verification.
| Brand | ACL |
|---|---|
| Manufacturer Part Number | 4B1925H-.025 |
| Component | Connecting-Rod Bearing Set |
| Size Selection | .025 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder. |
| Catalog Family | ACL Race Series |
| Half Type | Identical halves |
| Catalog Size Options | STD, .025, .25 |
Confirm the rod-bearing set contents and shell positions against the complete manufacturer number. The photo is representative of the part family.
Measure shaft journals, housing bores and assembled oil clearance using the engine builder’s specification. Check oil-hole alignment, groove placement and crankshaft fillet clearance before final assembly. Catalog standard dimensions must not be treated as the finished dimensions for a different repair size. ACL specifies that abrasive pads or paper must not be used on the bearing surface to alter oil clearance.
Is the year and model enough to choose this bearing? No. Match 4B1925H-.025 to the exact engine and measured build specification.
What size is this listing? .025 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.
Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.
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