What does '.25mm oversized' mean for these main bearings?

This means the bearings are slightly larger than standard size by 0.25mm. They are intended for use when the main journals on your engine's crankshaft have been machined down by 0.25mm during an engine rebuild or performance modification. Using the correct size bearing is critical for proper oil clearance.

Are these bearings suitable for a stock engine rebuild?

While these are performance bearings, they can be used in a stock rebuild if the crankshaft journals have been machined to the correct undersize. If your crankshaft journals are still at factory specification, you would need standard size bearings. Always verify your crankshaft journal dimensions before ordering.

What is the typical lifespan of these performance main bearings?

The lifespan of engine bearings depends heavily on proper installation, adequate oil supply and quality, and the operating conditions of the engine. ACL bearings are well-built for performance use, but factors like oil changes and driving style will significantly impact their longevity.

ACL Lexus V8 4.0L 1UZFE .25mm Oversized Performance Main Bearing Set

Specifications

Brand: ACL
Part #: 5M8088H-.25
UPC: 9315726435335

ACL Lexus V8 4.0L 1UZFE .25mm Oversized Performance Main Bearing Set

Name: ACL Lexus V8 4.0L 1UZFE .25mm Oversized Performance Main Bearing Set
Brand: ACL
Price: 164.62 USD
Availability: InStock

$164.62

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ACL V8 4.0L 1UZFE .25mm Oversized Performance Main Bearing Set. Direct fit for many Lexus and Toyota models.

Key Features

Fits 1998-2000 Lexus GS400, 1998-2007 Lexus GX470, 1990-2000 Lexus LS400, 1998-2007 Lexus LX470, 1992-2000 Lexus SC400, 2003-2009 Toyota 4Runner, 1998-2007 Toyota Land Cruiser, 2001-2009 Toyota Sequoia, and 2000-2009 Toyota Tundra.
Main bearings are .25mm oversized for use with machined crankshaft journals.
Multi-layer bearing material construction for durability.
Designed for performance engine applications.
Helps maintain proper oil clearance for engine longevity.

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Will this fit your vehicle?

Product Details

Already running a built V8? This main bearing set is a solid piece for your 1UZFE engine build. ACL is a well-known name in performance engine components, and these bearings are made to handle the demands of a performance engine, whether it's for daily driving or more spirited use. They're designed to work with your engine's crankshaft and block, helping to keep everything spinning smoothly under load.

This set includes main bearings that are .25mm oversized. This is important because it means they're meant to be used when the main journals on your crankshaft have been machined down by .25mm. Using the correct size bearing is crucial for maintaining proper oil clearance, which is key to engine longevity and performance. These bearings are made with a multi-layer bearing material that's built for durability and good friction characteristics.

This set fits a wide range of Lexus and Toyota V8 applications, including the Lexus GS400, LS400, SC400, and the Toyota 4Runner, Land Cruiser, Sequoia, and Tundra. Make sure to check the full fitment list to confirm it matches your specific vehicle. When you're rebuilding or upgrading your engine, using well-made bearings like these from ACL is a smart move to ensure reliable operation.