ACL 5M1695H-STD Race Main Bearing Set Standard Toyota 4AGE 4AGZE AE86 MR2 AW11

Vehicle Fitment

• 1983-1987 Toyota Corolla Levin (AE86) - 4A-GE 1.6L DOHC 16v (RWD)
• 1983-1987 Toyota Sprinter Trueno (AE86, JDM) - 4A-GE 1.6L DOHC 16v (RWD)
• 1984-1989 Toyota MR2 (AW11) - 4A-GE 1.6L DOHC 16v (Mid-Engine RWD)
• 1987-1993 Toyota Corolla (AE92) - 4A-GE 1.6L DOHC 16v; 4A-GZE 1.6L DOHC 16v Supercharged
• 1987-1992 Toyota Sprinter Trueno (AE92, JDM) - 4A-GZE 1.6L Supercharged variant
• 1995-1998 Toyota Corolla Levin / Sprinter Trueno (AE111) - 4A-GE 1.6L 20v Black Top
• 1990-1992 Geo Prizm GSi - 4A-GE (based on AE92 Corolla platform)
• Various Toyota Corolla, Corona, Sprinter with 2A, 3A, 5A, 7A engines sharing the same main journal dimensions

Fitment Notes

• This set covers the Toyota A-series inline-4 engine family - all variants from the 2A through 7A share the same crankshaft main journal dimensions, making a single bearing set applicable across the entire lineup. The primary performance application is the high-revving 4A-GE (all generations: 16v smallport, 16v bigport, 20v silvertop, 20v blacktop) and the supercharged 4A-GZE.
• Standard (STD) crankshaft main journal diameter - for use with stock or unworn journals at factory diameter only. For reground crankshafts, use 5M1695H-.025 (+0.025mm), 5M1695H-.25 (+0.25mm), or 5M1695H-.50 (+0.50mm) as appropriate.
• An HX extra-clearance variant (5M1695HX-STD) is also available for builders targeting approximately 0.025mm (0.001") additional running clearance at standard journal diameter without crankshaft grinding.
• Always measure crankshaft main journal diameter with a micrometer before selecting bearing size. Confirm actual clearance with Plastigage or a dial bore gauge after assembly.
• Sold as a complete set of 10 bearing shells (5 pairs, upper and lower) - sufficient for all 5 main journal positions in one 4-cylinder engine.

Features

• Tri-metal construction: copper-lead alloy lining bonded over a hardened steel backing, with a high-strength overlay plate - engineered for the high-RPM demands of naturally aspirated and supercharged 4A-GE / 4A-GZE builds routinely revved beyond 8,000 rpm.
• Hardened steel backing on all main bearings improves structural support of the bearing lining and maintains crush under the sustained high-RPM loads characteristic of 4A-GE performance applications.
• High-strength overlay plate with reduced thickness provides improved fatigue resistance compared to OEM-spec bearings - an essential upgrade for any 4A-GE or 4A-GZE rebuild targeting performance longevity.
• Increased bearing crush and tighter wall tolerances ensure consistent, secure seating in the block main journal bores, reducing the risk of bearing movement.
• Enlarged ID chamfers on bearing edges accommodate the larger fillet radii found on performance and aftermarket Toyota A-series crankshafts.
• 3/4-groove upper main bearings optimize oil supply to the main journals and to the connecting rod bearings through the crankshaft oiling passages.
• Elimination of flash plating on bearing backs improves heat transfer and maximizes grip between the bearing shell and the block main bore.
• Increased eccentricity compensates for bore distortion at high RPM and assists in the formation of a stable hydrodynamic oil film under load.

Specifications

• Part Number: 5M1695H-STD
• Product Line: ACL Race Series
• Application: Crankshaft Main Bearings
• Engine Compatibility: Toyota A-series Inline-4 - 4A-GE (1587cc DOHC 16v/20v), 4A-GZE (1587cc DOHC 16v Supercharged), and all 2A/3A/4A/5A/7A variants sharing the same main journal dimensions
• Crankshaft Size: Standard (STD - Unground)
• Shaft (Main Journal) Diameter: 47.985-48.000mm (1.8892-1.8898 in)
• Tunnel (Housing Bore): 52.020-52.050mm (2.0480-2.0492 in)
• Maximum Wall Thickness at Crown: 2.001mm (0.0788 in)
• Maximum Overall Length: 19.9mm (0.783 in)
• Bearing Material: Tri-Metal Copper-Lead Alloy / Hardened Steel Backing
• Quantity: Set of 10 Shells - 5 Upper + 5 Lower (complete engine set)

Included Components

• 10x Race Series Crankshaft Main Bearing Shells - Standard Size (5 upper, 5 lower)

Product Description

The ACL Race Series 5M1695H-STD crankshaft main bearing set is the standard-size performance replacement for Toyota's A-series inline-4 engine family - most notably the iconic 4A-GE and supercharged 4A-GZE, which powered the AE86 Corolla Levin/Sprinter Trueno, the first-generation AW11 MR2, and the AE92 Corolla GT-Z through five generations of continuous development from 1983 to the late 1990s. The 4A-GE is renowned for its extraordinary high-RPM capability - a Yamaha-developed head, aggressive cam profiles, and a lightweight reciprocating assembly that allows it to rev freely well past 8,000 rpm in performance-built form.

All Toyota A-series engines share identical crankshaft main journal dimensions, making this a single set applicable across the entire 2A through 7A family at standard crankshaft size. Built on ACL's Race Series tri-metal platform, these main bearings deliver superior fatigue resistance, crush retention, and oil film stability over OEM Toyota shells - an important foundation for any serious 4A-GE rebuild. Always confirm clearances at assembly. Sold as a complete set of 10 shells for one engine.