King MB4524XPC0.25 +0.25mm XPC Main Bearings Nissan GT-R VR38DETT VQ35HR VQ37VHR

Vehicle Fitment

• 2009-2026 Nissan GT-R (R35, AWD, 3.8L Twin-Turbo V6 VR38DETT)
• 2007-2008 Nissan 350Z (35th Anniversary, NISMO, Track, RWD, 3.5L V6 VQ35HR)
• 2009-2021 Nissan 370Z (Base, Sport, Sport Tech, Touring, NISMO, RWD, 3.7L V6 VQ37VHR)
• 2023-2026 Nissan Z (Base, Performance, Proto Spec, RWD, 3.0L Twin-Turbo V6 VR30DDTT)
• 2007-2008 Infiniti G35 Coupe (Base, Sport, RWD/AWD, 3.5L V6 VQ35HR)
• 2008-2014 Infiniti G37 Coupe / Sedan / Convertible (Base, Journey, Sport, X AWD, 3.7L V6 VQ37VHR)
• 2014-2016 Infiniti Q60 Coupe (Base, IPL, Sport, AWD, 3.7L V6 VQ37VHR)
• 2014-2026 Infiniti Q50 (Base, Luxe, Sport, Red Sport 400, RWD/AWD, 3.5L/3.7L/3.0T VQ35HR/VQ37VHR/VR30DDTT)
• 2017-2026 Infiniti Q60 (Base, Luxe, Red Sport 400, RWD/AWD, 3.0T VR30DDTT / 3.7L VQ37VHR)

Fitment Notes

• Primary fitment: Nissan GT-R R35 with VR38DETT 3.8L Twin-Turbo V6
• Also fits VQ35HR (3.5L), VQ37VHR (3.7L), and VR30DDTT (3.0L Twin-Turbo) 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 before ordering
• XPC Series = pMaxBlack tri-metal race construction + factory-applied pMaxKote nano-composite polymer coating; designed for high-load, high-RPM performance and race applications
• Does not fit the earlier VQ35DE (2003-2006 350Z / G35) - that engine uses a different main journal diameter
• Available in STD, STDX, and .026mm sizes under separate part numbers for standard-diameter crankshafts

Features

• XPC Series pMaxBlack tri-metal overlay is 24% harder than conventional race bearings, rated up to 10,200 PSI load capacity
• pMaxKote nano-composite ceramic polymer coating adds a fourth layer of seizure and cavitation protection with zero added wall thickness
• SecureBond micro-etch adhesion process prevents layer delamination under extreme RPM and high-boost thermal cycling
• RadiaLock crush height optimization prevents bearing spin in high-output aluminum 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
• Bull's Eye Tolerance wall thickness held to ±0.0001" for consistent clearance across all 4 main journals
• Lead-free construction meets current environmental compliance standards

Specifications

• Part Number: MB4524XPC0.25
• Undersize: +0.25mm (0.010")
• Series: XPC (pMaxBlack Tri-Metal + pMaxKote Polymer Coating)
• Engine: Nissan VR38DETT 3.8L / VQ35HR 3.5L / VQ37VHR 3.7L / VR30DDTT 3.0L V6
• Crankshaft Journal Diameter (STD): 64.98 / 64.95 mm (2.5581 / 2.5571 in)
• Housing Bore Diameter (STD): 70.02 / 69.99 mm (2.7566 / 2.7556 in)
• Bearing Length: 18.7 mm (0.736 in)
• Max Wall Thickness: 2.516 mm (0.0991 in)
• Overlay Load Capacity: Up to 10,200 PSI
• Wall Thickness Tolerance: ±0.0001"
• Position: Crankshaft Main (Upper and Lower shells)
• Quantity: 4 pairs (8 shells total - full V6/V6TT main bearing set)
• Available Sizes: STD / STDX / .026mm / +0.25mm

Included Components

• 4x Upper Main Bearing Shells
• 4x Lower Main Bearing Shells

Product Description

The King MB4524XPC0.25 is a +0.25mm undersize XPC Series race-grade crankshaft main bearing set engineered for the Nissan VR38DETT 3.8L Twin-Turbo V6 found in the R35 GT-R, as well as the shared main journal diameter used by the VQ35HR, VQ37VHR, and VR30DDTT engines in the 350Z, 370Z, 2023+ Z, G35, G37, Q50, and Q60 platforms. The XPC designation combines King's pMaxBlack tri-metal structure - 24% harder than conventional race bearings at up to 10,200 PSI load - with the factory-applied pMaxKote ceramic nano-composite polymer coating that adds a fourth layer of seizure and wear resistance without altering precision wall thickness.

This +0.25mm set is sized for crankshafts ground 0.25mm under standard main journal diameter and should only be used after verifying journal dimensions with a precision micrometer. The XPC Series is the premium choice for GT-R and VQ/VR platform engine builds where sustained high boost, high RPM, or race-duty load cycles demand more than OE-replacement bearings can provide. For crankshafts at factory diameter, the standard MB4524XPC or the STDX variant with extra clearance are the appropriate options.