What is the difference between standard size and undersize bearings?

Standard size bearings are meant to be installed on a factory-spec crankshaft that has not been machined undersize. Undersize bearings are used when the crankshaft journals have been ground down to remove damage or to achieve a specific clearance.

What does 'tri-metal construction' mean for these bearings?

Tri-metal bearings have three layers: a steel backing for strength, a softer intermediate layer for embeddability, and a bearing overlay for wear resistance. This construction is common in performance applications for durability and protection.

Do these bearings come with installation instructions?

While these bearings are designed as direct replacements, it is always recommended to consult your vehicle's specific service manual for the correct installation procedures and torque specifications.

Specifications

Brand: ACL
Part #: 4B1972H-STD
UPC: 9315726163061

ACL Acura/Honda K20A2/K24A Standard Size High Performance Rod Bearing Set

Name: ACL Acura/Honda K20A2/K24A Standard Size High Performance Rod Bearing Set
Brand: ACL
SKU: acl-acl-acura-honda-k20a2-k24a-standard-size-high-performance-rod-bearing-set-t14-12911
Price: 51.74 USD
Availability: BackOrder

$51.74

On Backorder — Expected to ship by Jun 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits Acura RDX (2007-2012), RSX (2002-2006), TSX (2004-2008), Honda Accord (2003-2007), CR-V (2002-2009), and Element (2003-2011).
Standard size bearings designed for factory-spec crankshafts.
Tri-metal construction offers a balance of strength and conformability.
Designed for performance K20A2 and K24A engine builds.

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About this part

Product Details

When you're building or rebuilding a performance Honda or Acura engine with a K20A2 or K24A block, the right bearings are crucial. ACL's high-performance rod bearings are well-built to handle the increased stress of performance applications. They use a tri-metal construction that offers a good balance of strength and conformability, helping to protect your crankshaft journals under demanding conditions. This set is standard size, meaning it's designed to fit a factory-spec crankshaft without needing any machining.

This set includes rod bearings for your K-series engine. If you're putting together a performance build, these are a solid option to ensure your engine internals can handle the power you're aiming for. Always refer to your engine's service manual for specific installation procedures and torque specifications.