What does 'undersize .25mm' mean for these bearings?

This means the bearings are made to fit a crankshaft that has been machined down by 0.25mm. This is common when a crankshaft is resurfaced during an engine rebuild to correct wear or damage.

What specific VW engines does this bearing set fit?

This set is designed for VW engines manufactured from 1974 onwards, with engine displacements ranging from 1588cc up to 1984cc.

Does this bearing set come with installation hardware?

This product is a set of main bearings only. Installation hardware, such as main cap bolts, is typically sold separately.

Specifications

Brand: ACL
Part #: 5M1645A-.25

ACL VW 4 1588-1715-1780-1984cc 1974-on Engine Crankshaft Main Bearing Set

Name: ACL VW 4 1588-1715-1780-1984cc 1974-on Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-vw-4-1588-1715-1780-1984cc-1974-on-engine-crankshaft-main-bearing-set-t14-630914
Price: 24.38 USD
Availability: BackOrder

$24.38

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ACL 5M1645A-.25 main bearing set for VW 1974-on engines. Undersize .25mm for crankshaft repair.

Key Features

Main Bearing Set — Replaces worn main bearings to restore proper crankshaft support.
For VW Engines (1974-on) — Fits a wide range of VW applications with 1588cc to 1984cc displacements.
Undersize .25mm — Designed for crankshafts that have been machined down by 0.25mm during a rebuild.
Direct Fit — Designed to fit right into the factory bearing locations.