King MB5595XP0.25 +0.25mm XP pMaxBlack Main Bearings Nissan KA24E KA24DE 240SX

Vehicle Fitment

• 1989-1998 Nissan 240SX (Base, SE, LE, S13/S14, RWD, 2.4L I4 KA24E/KA24DE)
• 1993-2001 Nissan Altima (Base, GXE, GLE, SE, RWD/FWD, 2.4L I4 KA24DE)
• 1990-1994 Nissan D21 Hardbody (Base, XE, SE, SE-V6, King Cab, RWD/4WD, 2.4L I4 KA24E)
• 1995-1997 Nissan Pickup (Base, XE, SE, RWD/4WD, 2.4L I4 KA24E)
• 1998-2007 Nissan Frontier (XE, SE, SC, Desert Runner, RWD/4WD, 2.4L I4 KA24DE)
• 2000-2004 Nissan Xterra (XE, SE, RWD/4WD, 2.4L I4 KA24DE)
• 1990 Nissan Axxess (Base, SE, FWD/AWD, 2.4L I4 KA24E)
• 1990-1992 Nissan Stanza (Base, XE, GXE, FWD, 2.4L I4 KA24E)

Fitment Notes

• Fits Nissan KA24E (SOHC, 8-valve) and KA24DE (DOHC, 16-valve) 2.4L inline-4 engines sharing the same main journal diameter - confirm engine code before ordering
• This is a +0.25mm undersize set - for use on crankshafts ground 0.25mm under standard main journal diameter; always measure journals with a precision micrometer before ordering
• XP Series = pMaxBlack tri-metal race construction; designed for high-performance and race applications using forged steel crankshafts under sustained high load
• The KA24DE (DOHC) is the preferred engine for 240SX performance builds - confirmed fitment across S13 (1989-1994) and S14 (1995-1998) chassis
• Does not fit the SR20DET, RB26DETT, or VG30 variants used in other Nissan platforms - verify engine code before ordering
• Available in STD, STDX, .026mm, +0.25mm, and +0.50mm sizes under separate part numbers

Features

• pMaxBlack tri-metal overlay is 24% harder than conventional race bearings, rated up to 10,200 PSI load capacity
• Intermediate layer tin content increased to 4.5% - 22% harder than standard race bearing intermediates (115 HV vs. 90-95 HV) with 17,000 PSI load capacity
• SecureBond micro-etch adhesion process prevents delamination under high-RPM and sustained thermal cycling
• RadiaLock crush height optimization prevents bearing spin in stock and performance aluminum/iron housings
• EccentriX eccentricity profiling ensures a stable hydrodynamic oil film under sustained race load
• U-Groove 90° oil groove design increases load-bearing surface area and improves oil retention at the journal
• Bull's Eye Tolerance wall thickness held to ±0.0001" for consistent clearance across all 5 main journals
• Lead-free construction meets current environmental compliance standards

Specifications

• Part Number: MB5595XP0.25
• Undersize: +0.25mm (0.010")
• Series: XP (pMaxBlack Tri-Metal Race Bearings)
• Engine: Nissan KA24E 2.4L SOHC I4 / KA24DE 2.4L DOHC I4
• Overlay Load Capacity: Up to 10,200 PSI
• Intermediate Layer Load Capacity: Up to 17,000 PSI
• Wall Thickness Tolerance: ±0.0001"
• Position: Crankshaft Main (Upper and Lower shells)
• Quantity: 5 pairs (10 shells total - full I4 main bearing set)
• Available Sizes: STD / STDX / .026mm / +0.25mm / +0.50mm

Included Components

• 5x Upper Main Bearing Shells
• 5x Lower Main Bearing Shells

Product Description

The King MB5595XP0.25 is a +0.25mm undersize XP Series race-grade crankshaft main bearing set engineered for the Nissan KA24E and KA24DE 2.4L inline-4 engine - the long-running platform found in the 240SX, Altima, Frontier, Xterra, D21 Hardbody, Pickup, Axxess, and Stanza from 1989 through 2007. The pMaxBlack tri-metal structure delivers 24% greater hardness over conventional race bearings, while a reinforced intermediate layer with 4.5% tin content (115 HV) provides a load capacity of 17,000 PSI, making this set the ideal choice for high-output KA24DE builds commonly used in 240SX drift and performance applications.

This +0.25mm undersize set is designed for crankshafts ground 0.25mm under standard main journal diameter. Always measure crankshaft journals with a precision micrometer before ordering - using the wrong undersize will produce incorrect oil clearance and potential engine failure. For crankshafts at factory diameter, the standard MB5595XP or STDX variant are the correct choices. Additional undersizes (.026mm and +0.50mm) are available under separate part numbers.