Fits select 1984-2004 Nissan and Infiniti models including 300ZX, Maxima, Pathfinder, Xterra, Frontier, J30, M30, and QX4 (3.0L V6).

Engineered for high-RPM and high-load environments, the ACL Race Series Main Bearing Set (MPN: 4M2737H-STD) provides the durability required for performance engine builds. These standard-size bearings feature a unique combination of design, metallurgy, and engineering to withstand the high cylinder pressures found in performance Nissan VG-series engines. Whether you are refreshing a naturally aspirated VG30 or building a high-boost VG30DETT, these tri-metal bearings offer superior load-carrying capacity and seizure resistance compared to standard OE components.

• Manufacturer Part Number: 4M2737H-STD
• Bearing Size: Standard
• Compatible Engines: 3.0L V6 (VG30)
• Material: High-strength tri-metal lead-tin-copper
• Application: High-performance street or competition use

Fits select 1984-2004 Nissan and Infiniti models including the 300ZX, Maxima, Pathfinder, Xterra, and Quest (3.0L).

Engineered for high-stress environments, this ACL High Performance Main Bearing Set is specifically designed for engine rebuilds where the crankshaft has been ground to a 0.25mm undersize. These bearings provide the precise tolerances and material strength required for both street and track applications, ensuring reliable oil film thickness and load capacity under demanding conditions.

• Part Number: 4M2737H-.25
• Oversize: 0.25mm (.010")
• Engine Compatibility: 3.0L V6 (Including VG series)
• Construction: High-strength tri-metal design for superior fatigue resistance
• Application: Direct replacement for worn OE main bearings during performance overhauls

Whether you are restoring a classic 300ZX Turbo or refreshing a hard-working Frontier, ACL bearings deliver the durability needed to protect your engine's rotating assembly.

Fits select 1995-2001 Nissan Maxima and Infiniti I30 (3.5L).

The ACL Race Series main bearing set is engineered for high-RPM, high-stress performance environments where factory tolerances aren't enough. This "HX" variant features an additional 0.025mm (0.001") of oil clearance compared to standard race bearings, providing a thicker oil film to prevent metal-to-metal contact during extreme engine loads. Built with a high-strength tri-metal design, these bearings offer the fatigue resistance and embeddability required for forged internals and high-output builds.

• Manufacturer Part Number: 4M2633HX-STD
• Series: ACL Race Series
• Bearing Size: Standard (STD)
• Oil Clearance: Extra Clearance (HX)
• Construction: Tri-metal lead, tin, and copper for superior load capacity
• Hardened steel backs for improved bearing retention and heat dissipation
• Provides critical lubrication safety margins for high-performance V6 engines

Fits select 1995-2001 Nissan Maxima and Infiniti I30 (3.5L).

The ACL High Performance Main Bearing Set (MPN 4M2633H-.25) is engineered for VQ35DE engines where the crankshaft has been ground, requiring a 0.25mm undersize to restore proper oil clearances. These bearings are designed to handle the increased loads and higher RPMs found in performance applications, providing superior fatigue strength and load-carrying capacity compared to standard OE components.

• Precision Fit: 0.25mm (.010") oversized shells for machined crankshaft journals.
• High-Strength Construction: Engineered to withstand high-stress racing and street environments.
• Consistent Oil Film: Precision manufacturing ensures uniform wall thickness for reliable lubrication.
• Part Number: 4M2633H-.25

Fits 1995-2001 Nissan Maxima and 1996-2001 Infiniti I30 (3.5L).

Engineered for high-RPM and heavy-load applications, the ACL High Performance Main Bearing Set provides the essential durability and precision required for performance engine builds. This 0.025 oversized set is designed specifically for crankshafts that have been ground or machined, ensuring proper oil clearances and reliable operation. Featuring a tri-metal construction, these bearings offer superior fatigue strength and the ability to withstand the stresses of high-output V6 engines.

• Manufacturer Part Number: 4M2633H-.025
• Size: 0.025 Oversize
• Material: High-strength tri-metal (copper, lead, tin) for maximum load capacity
• Design: Hardened steel backing and increased crush for improved bearing retention
• Performance: Optimized for high-RPM stability and precise oiling

Fitment Table:

Fits 2009-2021 Nissan GT-R models including Base, Premium, Black Edition, Nismo, and Track Edition (VR38DETT).

Protect your engine's crankshaft and rotating assembly with the ACL High Performance Main Bearing Set. Engineered specifically for the demanding oiling requirements and high-load environments of the Nissan VR38DETT, these standard (STD) size bearings offer the precision tolerances needed for a high-performance rebuild. Whether for street use or competitive track applications, this set provides a reliable replacement for worn original equipment bearings.

• Manufacturer Part Number: 4M2505H-STD
• Engine Fitment: Nissan 3.8L V6 (VR38DETT)
• Bearing Size: STD (Standard)
• Application: High Performance/Race replacement for factory main bearings

Fits select 1997-2017 Acura, Honda, and Saturn models including Accord, Odyssey, Pilot, and TL equipped with the J35 3.5L V6 engine.

High-performance engine builds demand components capable of withstanding extreme RPMs and high-load environments. The ACL Race Series Main Bearing Set is specifically engineered for the 3471cc J35 V6, providing the precision tolerances and durability required for competitive racing or high-stress street applications. These bearings are designed to handle higher loads than standard OE components, ensuring reliable lubrication and crankshaft support during aggressive operation.

• Manufacturer Part Number: 4M1996H-STD
• Series: ACL Race Series
• Bearing Size: Standard (STD)
• Engine Compatibility: Honda J35 3471cc V6 SOHC 4-Valve
• Engineered for high-RPM and high-load performance applications
• Replaces factory main bearings with high-strength performance shells

Fits select 1987-2005 Chrysler, Dodge, Hyundai, Mitsubishi, and Plymouth vehicles equipped with the 6G72, 6G72T, or 6G73 V6 engines.

Engineered for precision and durability during engine overhauls, these ACL main bearings provide the exact tolerances required to restore factory oil clearances and support the crankshaft. Designed as a direct standard-size replacement, these bearings are critical for maintaining consistent oil pressure and reducing friction in high-stress internal environments. Whether you are refreshing a daily driver or rebuilding a performance 6G72T, these bearings offer the reliability and material integrity required for long-term engine health.

• Manufacturer Part Number: 4M1149H-STD
• Size: Standard (STD)
• Engine Compatibility: Mitsubishi 6G72, 6G72T (Twin Turbo), and 6G73
• Construction: High-strength materials for improved fatigue resistance
• Fitment: Replaces worn factory main bearings to ensure proper crank alignment

Fits select 2001-2015 Lexus HS250h, Scion tC and xB, and Toyota Camry, Corolla, Highlander, Matrix, RAV4, and Solara (2.4L).

The ACL High Performance Rod Bearing Set is designed for engine builders seeking precision and durability in high-load environments. These standard-size bearings are engineered to meet the demanding tolerances of the Toyota 2AZFE 2.4L engine, providing a reliable interface between the crankshaft journals and connecting rods. Whether performing a routine rebuild or a performance overhaul, these bearings ensure consistent oil film thickness and reduced friction.

• Manufacturer Part Number: 4B8411H-STD
• Engine Compatibility: Toyota 2AZFE (2.4L)
• Bearing Size: Standard (STD)
• Application: High Performance / Race Series construction
• Quantity: Complete set for one engine

Maintain critical clearances and ensure smooth operation in your Toyota 1E, 2E, or 4E-FE engine with this ACL Standard Size Rod Bearing Set. Precision-engineered, these bearings are a direct replacement for your worn original equipment (OE) components, designed to meet the demands of stock engine builds.

Rod bearings are crucial for the rotating assembly, supporting the connecting rods on the crankshaft journals. Over time, these bearings can wear, leading to increased friction, reduced oil pressure, and potential engine damage. Installing a fresh set of standard size ACL bearings restores proper oil film thickness and reduces metal-on-metal contact, preserving the longevity and performance of your engine's bottom end.

• Fitment: Designed for 1985-1999 Toyota vehicles equipped with 1E, 2E, or 4E-FE engines.
• Size: Standard size for direct OE replacement.
• Construction: Engineered for durability and consistent performance.
• Manufacturer Part Number (MPN): 4B8390A-STD

When rebuilding your 1987-1994 Toyota's 1.5L 3E/3EE or 1.5L 5EFE 4-cylinder engine, installing a fresh set of rod bearings is crucial for reliable crankshaft rotation and connecting rod lubrication. This ACL Standard Size Rod Bearing Set is engineered to meet original equipment specifications, ensuring a precise fit and restoring proper oil clearances.

Crafted from durable aluminum, these bearings are designed for street applications, offering a reliable replacement for worn or damaged factory units. They are intended for engines that have not undergone crankshaft grinding or machining that would require an oversized bearing set.

• Manufacturer: ACL
• Part Number: 4B8380A-STD
• Material: Aluminum
• Size: Standard (STD)
• Engine Fitment: Toyota 1.5L 3E/3EE / 1.5L 5EFE 4-Cylinder
• Vehicle Fitment: Select Toyota models 1987-1994
• Application: Direct replacement for OE rod bearings

Fits select 1995-2004 Toyota 4Runner, T100, and Tacoma models equipped with 1RZ, 2RZ, or 3RZ inline-four engines.

Designed for demanding high-RPM and high-load applications, this ACL High Performance Rod Bearing Set provides the increased durability required for performance-built engines and heavy-duty use. These standard-size bearings are engineered with precise tolerances to ensure optimal oil clearance and consistent oil film thickness, protecting your crankshaft and connecting rods under extreme stress. Whether you are refreshing a 2.4L 2RZ-FE or a 2.7L 3RZ-FE, these bearings deliver the reliability and fatigue resistance expected from a track-proven component.

• Manufacturer Part Number: 4B8376H-STD
• Bearing Size: Standard (STD)
• Engine Compatibility: Toyota 1RZ, 2RZ, 3RZ Inline 4
• Engineered for high-performance and high-load environments
• Precision-manufactured for consistent oil film and clearance

Vehicle Fitment:

Fits select 1986-1995 Toyota Celica and MR2 (3S-GTE).

Engineered for high-performance builds and demanding racing environments, this ACL rod bearing set is designed to provide extra oil clearance for the Toyota 3S-GTE engine. By increasing the oil film thickness, these bearings offer enhanced protection during high-RPM operation and high-load conditions common in turbocharged applications. The high-strength trimetal construction ensures superior fatigue resistance and load-carrying capacity compared to factory components, making them an essential upgrade for built 3S-GTE blocks.

• Manufacturer Part Number: 4B8366HX-STD
• Bearing Size: Standard Size (STD)
• Clearance Type: Extra Oil Clearance (HX)
• Engine Application: Toyota 3S-GTE
• Material: High-performance trimetal for maximum durability

Fits select 1986-1995 Toyota Celica and MR2 (3S-GTE).

Protect your engine's rotating assembly with this ACL High Performance rod bearing set. This 0.50mm (.020") oversized set is specifically engineered for 3S-GTE engines where the crankshaft journals have been machined to accommodate an oversize bearing. Designed to withstand the high-RPM and high-load demands of performance driving, these bearings provide the precise tolerances and fatigue resistance required for a reliable bottom-end build.

• Application: 0.50mm (.020") Oversize
• Material: High-strength performance bearing construction
• Engine Code: Toyota 3S-GTE
• Precision engineered for consistent oil clearance
• Manufacturer Part Number: 4B8366H-.50

Fits select 1986-2005 Mazda, Kia, and Mercury models including the Miata, Protege, 323, Rio, and Capri (B6/BP/BP-T engines).

Engineered for high-performance and competition use, the ACL Race Series rod bearing set is designed to withstand the high RPMs and heavy loads found in turbocharged or high-compression builds. These bearings feature a hardened steel back with a tri-metal copper-lead overlay to provide superior fatigue strength and load-carrying capacity compared to standard OE components.

This specific set (4B8351HX-STD) is a standard size bearing but features the "HX" designation, providing extra oil clearance. This additional clearance is essential for performance builders who require increased oil flow for better lubrication and cooling of the crankshaft journals under extreme racing conditions. They are a direct replacement for factory bearings when the crankshaft remains at its original factory journal diameter.

• Manufacturer Part Number: 4B8351HX-STD
• Series: Race Series
• Size: Standard (STD) with Extra Oil Clearance (HX)
• Construction: Tri-metal hardened lead/tin/copper bonding
• Engine Compatibility: Mazda B6, BP, and BP-T
• Application: High-performance/Competition use only

Fits select 1986-2005 Mazda (323, Miata, MX-3, Protege), Kia (Rio, Sephia), and Mercury (Capri) models with 1.8L engines. This ACL High Performance rod bearing set is engineered for engines that require a .50mm oversized bearing to compensate for crankshaft machining or to restore factory clearances.

Designed to withstand the increased loads of performance applications, these bearings are essential for rebuilding Mazda B6, BP, and BP-T engine platforms. They offer the fatigue resistance and durability required for high-RPM operation and forced induction setups. Each set is manufactured to exacting tolerances to ensure consistent oil film thickness and reliable engine longevity.

• Manufacturer Part Number: 4B8351H-.50
• Size: .50mm (.020") Oversized
• Engine Compatibility: B6 / BP / BP-T (1.8L)
• Application: Connecting Rod Bearings
• Fits select 1986-2005 Mazda, Kia, and Mercury models

Fits select 1986-2005 Mazda, Kia, and Mercury models (1.8L) including the Miata, 323, Protege, and Rio.

This ACL High Performance Rod Bearing Set is engineered for engine builders who require precision and durability for B6, BP, and BP-T engine platforms. These .25mm (.010") oversized bearings are specifically designed for applications where the crankshaft journals have been machined or ground to a smaller diameter, ensuring the correct oil clearance and bearing-to-journal interface is maintained during high-stress operation.

• Manufacturer Part Number: 4B8351H-.25
• Oversize: .25mm (.010")
• Component Type: Connecting Rod Bearings
• Engine Series: Mazda B6 / BP / BP-T 1.6L and 1.8L
• Condition: For ground/machined crankshaft journals

Fits select 1986-2005 Kia Rio and Sephia, Mazda 323, Miata, MX-3, and Protege, and Mercury Capri (1.8L).

This ACL Race Series rod bearing set is engineered for high-performance applications where increased loads and high RPMs demand superior durability. Featuring a sophisticated tri-metal design, these bearings provide the essential fatigue strength and embeddability required for forced induction or high-output naturally aspirated B6, BP, and BP-T engine builds. The .025mm oversized configuration allows for precise oil clearance adjustments or compensates for crankshaft journal machining.

• Manufacturer Part Number: 4B8351H-.025
• Bearing Size: .025mm Oversized
• Engine Compatibility: Mazda B6 / BP / BP-T (1.8L)
• Construction: Tri-metal hardened lead/tin/copper over a steel backing
• Application: High-performance race and street use

Fits select 2012-2026 Subaru Impreza, Forester, Legacy, Outback, Crosstrek, and XV Crosstrek (FB20/FB25 engines).

This ACL High Performance Rod Bearing Set is engineered to withstand the rigorous demands of modern Subaru boxer engines. Designed specifically for the FB20 and FB25 platforms, these bearings provide the necessary load-carrying capacity and durability for both high-rpm operation and daily driving. These are standard size (STD) bearings, intended for use with crankshafts that maintain original factory tolerances.

• Manufacturer Part Number: 4B8325H-STD
• Engine Fitment: Subaru FB20 (2.0L) and FB25 (2.5L) H4
• Size: Standard (STD)
• Application: High Performance / Replacement

Each set includes the necessary bearings to complete one engine build. When rebuilding an FB-series engine, precise clearances are critical; ACL's manufacturing process ensures consistent thickness and material integrity for reliable oil film maintenance under load.

Fits select 1991-2005 Subaru Legacy, Impreza, Forester, Outback, and Saab 9-2X models (EJ15, EJ16, EJ18, EJ20, EJ22, EJ25) with 48mm crankshaft journals.

Engineered for the demanding environments of high-output engines, this ACL High Performance Connecting Rod Bearing Set (4B8320H-STD) provides the durability and precision required for both naturally aspirated and turbocharged Subaru EJ-series applications. These bearings are designed to handle increased RPMs and higher loads, making them a staple for performance rebuilds where standard OE components may fail.

• Manufacturer Part Number: 4B8320H-STD
• Journal Size: 48mm
• Size: Standard (STD)
• Quantity: Full set for 4 connecting rods
• Compatibility: Fits EJ-series engines including EJ20T, EJ20TT, EJ22T, and EJ25T variants

This set replaces worn or damaged factory rod bearings and is specifically sized for crankshafts that maintain the factory 48mm journal diameter without being ground undersize.

Fits select 2013-2025 Subaru (Ascent, BRZ, WRX, Legacy, Outback), Toyota (86, GR86), and Scion (FR-S) models.

Engineered for high-RPM racing and performance builds, this ACL High Performance Rod Bearing Set provides the durability and precision required for the FA-series engine platform. This specific set is the "HX" variant, which features an extra 0.025mm (0.001") of oil clearance compared to standard bearings, facilitating better oil flow and cooling in demanding track or high-boost environments.

Each bearing features a tri-metal construction for superior load-carrying capacity and fatigue resistance. These are designed to drop into factory journals while providing the specific tolerances needed for aftermarket crankshaft and rod combinations requiring additional clearance.

• Manufacturer Part Number: 4B8310HX-STD
• Bearing Size: Standard (STD)
• Clearance Type: Extra Oil Clearance (HX)
• Material: Tri-metal performance alloy
• Quantity: Full rod bearing set

Fits select 2013-2025 Subaru, Toyota, and Scion models including Ascent, BRZ, Legacy, Outback, WRX, 86, and FR-S.

The ACL 4B8310H-STD High Performance Rod Bearing Set is engineered to withstand the demanding conditions of high-RPM and heavy-load engine environments. Specifically designed for FA-series platforms, these standard-sized bearings provide the reliability and precise tolerances required for performance builds and engine refreshes. They are a direct replacement for worn factory bearings, offering enhanced durability under stress.

• Manufacturer Part Number: 4B8310H-STD
• Size: Standard Size (STD)
• Compatibility: Subaru FA20 / FA24 series engines
• Important Note: Does NOT fit Subaru FA24D 2387cc Flat4 DOHC 4v engines equipped with 52mm rod journals

Vehicle Fitment

Fits select 2013-2025 Subaru Ascent, BRZ, Legacy, Outback, WRX, Toyota 86, GR86, and Scion FR-S.

Engineered for high-RPM and high-load applications, this ACL Race Series rod bearing set provides the durability required for performance-built FA-series engines. These bearings feature a tri-metal design consisting of a lead-tin-copper overlay on a nickel barrier and a hardened steel back. This specific set is .025mm oversized, offering increased oil clearance for builders who require precise tolerances beyond standard factory specifications.

• Manufacturer Part Number: 4B8310H-.025
• Bearing Type: High Performance Tri-Metal Rod Bearings
• Size: .025mm Oversized (increased clearance)
• Hardened steel backs for improved bearing support and retention
• Increased eccentricity to compensate for bore distortion at high speeds
• Designed to withstand high crush for maximum retention and heat transfer

Fits select 1991-2005 Subaru Legacy, Impreza, Forester, and Outback, and 2005 Saab 9-2X Aero (EJ20 / EJ22 / EJ25 engines with 52mm journal size).

Engineered for high-rpm performance and heavy-duty competition, these ACL Race Series connecting rod bearings provide the durability required for forced induction and high-output builds. This "HXC" set features a CT-1 dry film lubricant coating to reduce friction and heat during startup and extreme operation. Designed with an additional .001 inch (0.025mm) of oil clearance compared to standard H-series bearings, these are ideal for engines running higher viscosity oils or requiring increased flow for cooling and lubrication.

• Manufacturer Part Number: 4B8296HXC-STD
• Journal Size: 52mm
• Size: Standard (STD) with Extra Oil Clearance (X)
• Coating: CT-1 Dry Film Lubricant for reduced wear and friction
• Construction: Tri-metal hardened lead/tin/copper for superior fatigue strength
• Fitment: Fits EJ-series engines with 52mm rod journals

Fits select 1991-2005 Subaru Forester, Impreza, Legacy, Outback, and Saab 9-2X (EJ20 / EJ22 / EJ25).

Engineered for high-performance and race applications, these ACL rod bearings are designed to handle the increased loads and RPMs of modified EJ-series engines. This specific set features the "HX" designation, providing an additional 0.001 inches of oil clearance compared to standard bearings, which is essential for maintaining a consistent oil film in high-heat and high-stress environments.

These bearings are sized for the 52mm journal found on many Subaru crankshafts and are provided in a standard (STD) size. They are a direct replacement for factory bearings during a rebuild, offering superior durability and fatigue resistance over OE components.

• Manufacturer Part Number: 4B8296HX-STD
• Engine Compatibility: EJ20, EJ22, EJ25
• Journal Diameter: 52mm
• Bearing Size: Standard (STD)
• Clearance Type: Extra Oil Clearance (HX)
• Included: Full set of connecting rod bearings

Fits 1991-2005 Subaru Forester, Impreza, Legacy, and Outback, and 2005 Saab 9-2X (EJ20 / EJ22 / EJ25).

These ACL High Performance rod bearings are engineered for high-load engine builds where precision and reliability are critical. Designed for Subaru EJ-series engines with a 52 journal size, these bearings feature a CT-1 dry film lubricant coating. This specialized coating reduces friction, helps dissipate heat, and provides a layer of protection against galling and seizure during cold starts or momentary oil pressure drops.

• Manufacturer Part Number: 4B8296HC-STD
• Series: High Performance
• Coating: CT-1 Dry Film Lubricant
• Journal Size: 52
• Size: Standard (STD)
• Engine Compatibility: EJ20, EJ22, EJ25

Fits select 1991-2005 Subaru Impreza, WRX, Legacy, Forester, Outback, and Saab 9-2X (EJ20 / EJ22 / EJ25).

Designed for high-rpm performance and heavy-load reliability, the ACL Race Series rod bearing set is an essential upgrade for Subaru EJ-series engine builds. These bearings are engineered to withstand the rigorous demands of turbocharged and high-compression naturally aspirated applications where factory tolerances and materials may reach their limits. Featuring a tri-metal lead-tin-copper bonding, these bearings offer the embedding capacity and fatigue resistance required for long-term engine health.

• Precision Engineering: Manufactured to standard size for 52mm crankshaft journals.
• Tri-Metal Construction: Provides a high strength-to-thickness ratio for superior load-carrying capacity.
• Enhanced Oil Flow: Designed with specialized tracking to maintain a consistent oil film under high centrifugal force.
• Heat Resistance: Hardened steel backings improve bearing retention and heat dissipation.
• Manufacturer Part Number: 4B8296H-STD

Fits select 1991-2005 Subaru and Saab models (including Impreza WRX, Forester, Legacy, and 9-2X Aero) equipped with EJ20, EJ22, or EJ25 engines.

Designed for high-performance engine builds and professional racing applications, this ACL High Performance rod bearing set provides the durability required for increased RPM and high-load environments. These bearings feature a tri-metal construction to optimize load-carrying capacity and fatigue resistance. As a 0.50mm oversized set, these are intended for use with crankshafts that have been precision-machined to restore journal surface integrity.

Engineered specifically for EJ-series engines with a 52mm journal size, these bearings ensure precise oil clearance and consistent lubrication flow across the crankpin.

• Manufacturer Part Number: 4B8296H-.50
• Series: ACL High Performance
• Engine Compatibility: Subaru EJ20, EJ22, EJ25
• Journal Size: 52mm
• Undersize/Oversize: 0.50mm
• Construction: High-strength tri-metal lead/tin/copper lining

Fits select 1991-2005 Subaru (Forester, Impreza, Legacy, Outback) and Saab 9-2X equipped with EJ20, EJ22, or EJ25 engines.

The ACL Race Series rod bearing set is engineered for high-performance applications where increased RPMs and higher loads put extreme stress on engine components. These 0.25mm oversized bearings are intended for use with crankshafts that have been ground to restore journal surface integrity. Precision-manufactured to maintain exacting clearances, these bearings feature a tri-metal construction for superior fatigue resistance and load-carrying capacity.

• Manufacturer Part Number: 4B8296H-.25
• Oversize: 0.25mm (requires crankshaft machining)
• Journal Size: Fits 52mm diameter crankshaft journals
• Construction: High-strength tri-metal for extreme durability
• Compatibility: Subaru EJ20, EJ22, and EJ25 platforms
• Series: ACL Race Series (H-Series)