What does '1.0mm undersize' mean for these bearings?

This means the bearings are designed to fit a crankshaft that has been machined down by 1.0mm. This is typically done to correct for wear or to achieve specific internal engine clearances during a rebuild.

What is the construction of these main bearings?

These bearings are constructed with a bimetal design, which includes an aluminum base. This type of construction is well-suited for performance engine applications.

Are these bearings suitable for a stock SR20DE engine?

While these are performance bearings, they can be used in a stock SR20DE if the crankshaft has been machined to the 1.0mm undersize specification. For a stock, unmachined crankshaft, you would need a standard size bearing set.

Specifications

Brand: King Engine Bearings
Part #: MB5243AM1.0
UPC: 611500300349

King Engine Bearings Nissan SR20DE (Size 1.0mm) Performance Main Bearing Set

Name: King Engine Bearings Nissan SR20DE (Size 1.0mm) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-sr20de-size-1-0mm-performance-m-t14-4318614
Price: 44.99 USD
Availability: BackOrder

$44.99

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Fits 1991-2002 Infiniti G20. King Engine Bearings performance main bearing set for SR20DE engines. 1.0mm undersize.

Key Features

Fits 1991-2002 Infiniti G20, 1995-1998 Nissan 200SX, 1991-1993 Nissan NX, and 1991-1994, 1996-2001 Nissan Sentra.
Performance main bearing set for Nissan SR20DE engines.
Features a bimetal construction with an aluminum base.
This set is 1.0mm undersize, intended for use with a machined crankshaft.

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About this part

Product Details

This is a performance main bearing set from King Engine Bearings, specifically for Nissan SR20DE engines. You get the main bearings needed to rebuild the bottom end of your engine. These bearings are made with a bimetal construction, featuring an aluminum base, which is a common and well-regarded material for performance applications.

The set is 1.0mm undersize, meaning it's intended for crankshafts that have been machined down by 1.0mm to correct for wear or to achieve specific clearances. King Engine Bearings is a popular choice for those looking for solid internal engine components. This set is designed to handle the demands of performance SR20DE builds.