What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are intended for use when the engine's crankshaft has been machined down by 0.25mm (or 0.010 inches) due to wear or during a performance rebuild. Using the correct undersize bearing ensures proper clearance and oil pressure.

What is the 'pmax Black' material mentioned?

The pmax Black material is a tri-metal bearing construction developed by King Engine Bearings for their racing line. It offers improved load-carrying capacity and wear resistance compared to standard bearings, making it suitable for high-performance applications.

Do these bearings come with new main bolts?

This product is for the main bearing set only. It does not include new main cap bolts. It is recommended to consult your vehicle's service manual for specific torque specifications and to consider replacing main cap bolts if they are stretched or damaged.

Specifications

Brand: King Engine Bearings
Part #: MB4104XP0.25
UPC: 611500555145

King Engine Bearings Nissan VG30DE/VG30DETT Performance Main Bearing Set - Size +0.25mm

Name: King Engine Bearings Nissan VG30DE/VG30DETT Performance Main Bearing Set - Size +0.25mm
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-vg30de-vg30dett-performance-mai-t14-4326157
Price: 143.23 USD
Availability: BackOrder

$143.23

On Backorder — Expected to ship by Sep 16, 2026

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

King Engine Bearings performance main bearing set for Nissan VG30DE/VG30DETT engines. Size +0.25mm.

Key Features

Fits 1993-1997 Infiniti J30, 1984-1996 Nissan 300ZX, 1986-1989 Nissan D21, 2001-2004 Nissan Frontier, 1991-1994 Nissan Maxima, 1987-1989 and 1996-2000 Nissan Pathfinder, 1997-2002 Nissan Quest, and 2002-2004 Nissan Xterra.
Performance main bearing set for Nissan VG30DE and VG30DETT engines.
Features King's pmax Black tri-metal material, designed for racing applications.
This set is sized +0.25mm, suitable for use with a crankshaft machined to that size.
Part of King's XP series, indicating enhanced performance characteristics.

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About this part

Product Details

If you're rebuilding the bottom end of a Nissan VG30DE or VG30DETT engine, these performance main bearings from King Engine Bearings are a solid option. They are specifically designed for these popular Nissan V6 engines, which you'll find in vehicles like the 300ZX, Maxima, and Pathfinder. These bearings are part of King's pmax Black racing line, meaning they're built for demanding use where oil clearance is critical.

The 'XP' in the part number indicates the pmax Black tri-metal material, which offers improved performance over standard bearings, especially in high-stress situations. This set is sized at +0.25mm, which is important to note if your crankshaft has been machined undersize during a rebuild. Using the correct bearing size is crucial for maintaining proper oil pressure and ensuring the longevity of your engine's rotating assembly.

When you're putting an engine back together, especially one that's going to see spirited driving or track time, using well-built internal components like these King bearings makes a difference. They are designed to handle the increased loads and heat that performance applications can generate.