ACL connecting-rod bearing set — manufacturer catalog product photo
ACL engine bearing-shell profile drawing — shell shape and oil-hole layout
ACL engine bearing-shell profile drawing — shell shape and oil-hole layout
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ACL BMW N20B20 / N26B20 2.0L Inline Race Series Standard Size Conrod Rod Bearing Set

ACL
ACL4B1584H-STD
4B1584H-STD
Bearings
9 Units In Stock
$ 246.71
$ 246.71

ACL 4B1584H-STD is a connecting-rod bearing set for the cataloged BMW N20B20, N26B20 engine configurations. STD manufacturer size designation; verify the exact engine and assembled clearance.

Bearing Configuration

H identifies the ACL Race Series family. Match the complete suffix to the required clearance, shell width and locating features.

Engine Application

Manufacturer / Engine BMW — N20B20
Manufacturer / Engine BMW — N26B20

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.

Specifications

Brand ACL
Manufacturer Part Number 4B1584H-STD
Component Connecting-Rod Bearing Set
Size Selection STD manufacturer size designation; verify the exact engine and assembled clearance.
Catalog Family ACL Race Series
Half Type Upper & lower
Catalog Size Options STD, .025, .25, .50

Quantity and Assembly Checks

Confirm the set contents, bearing positions and any separate thrust components 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.

Frequently Asked Questions

Is the year and model enough to choose this bearing? No. Match 4B1584H-STD to the exact engine and measured build specification.

What size is this listing? STD manufacturer size designation; verify the exact engine and assembled clearance.

Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.

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Shop ACL engine components, engine bearings and oil pumps.

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Shop ACL engine bearings, Race Series rod and main bearings, thrust washers, and selected oil pumps at Black Ops Auto Works. Compare the complete manufacturer part number, engine application, bearing position, and size designation before choosing parts for a rebuild. Standard-size, extra-clearance, and repair-size bearings serve different measured requirements and are not interchangeable simply because the engine family matches. ACL Rod Bearings, Main Bearings, and Thrust Components Connecting-rod bearings support the crankshaft rod journals. Main bearings support the crankshaft in the block, while thrust faces or separate thrust washers control axial movement. The correct set depends on the engine version, journal dimensions, housing bore, and thrust arrangement. Some applications use individual bearing pairs or selective grades rather than one complete engine set. Check the stated package quantity and full suffix before ordering. What Do ACL H and HX Mean? H identifies an ACL Rac...

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