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Engines and Components Engine Bearings

ACL

ACL Honda 4 B18A1/B18B1 (0.25 Oversize) Race Series Rod Bearing Set

$87.08 $73.62 Save $13.46

SKU: A002 4B1946HD-.25

Special Order
Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

They feature a unique combination of design, metallurgy, and engineering for demanding applications.

Key features include a high-strength overlay plate with reduced thickness for improved fatigue properties, hardened steel backs for enhanced support and retention, and increased crush for better bearing retention. The bearings also incorporate increased eccentricity to compensate for bore distortion at high RPMs and assist in forming hydrodynamic oil films. Additionally, they have enlarged ID chamfers to accommodate large fillet radii on performance crankshafts.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandACL
Part NumberA002 4B1946HD-.25

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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