ACL 5M1186H-STD Race Series Main Bearing Set for 1992-1997 Mitsubishi 4G63

Vehicle Fitment

• 1992.5-1997 Mitsubishi Eclipse (4G63 / 4G63T)
• 1992-1997 Mitsubishi Lancer Evolution I-IV (4G63 / 4G63T)
• 1994-2003 Mitsubishi Galant (4G64)
• 1993-1996 Eagle Summit (4G63 / 4G64)
• 1993-1995 Mitsubishi Expo / Expo LRV (4G63)

Features

• Race Series tri-metal main bearing set
• Standard (OEM) size - no oversize required
• 3/4 groove design for optimized oil flow
• Hardened steel backings for shell strength
• Increased crush to ensure bearing retention
• Engineered eccentricity for consistent oil film
• Precise wall tolerances for stable clearances
• Enlarged chamfers to clear large crank fillets

Specifications

• Part Number: 5M1186H-STD
• Size: Standard (STD), +0.000 mm
• Material: F780 tri-metal alloy
• Max Journal (Shaft) Diameter: ~57.000 mm
• Min Journal Diameter: ~56.985 mm
• Max Housing (Tunnel) Diameter: ~61.021 mm
• Min Housing Diameter: ~61.000 mm
• Shell Width (Overall): ~20.63 mm
• Half-Type: Upper & Lower shells included

Included Components

• 1x Complete main bearing set (upper + lower shells)

Product Description

The ACL 5M1186H-STD Race Series main bearing set is engineered for Mitsubishi 4G63 and 4G64 engines, including turbocharged variants. Standard OEM sizing ensures proper fit for rebuilds where crank journals are in spec, providing reliable bottom-end performance.

Constructed from durable F780 tri-metal alloy with hardened steel backings, these bearings are designed for high RPM and high-load conditions. The 3/4 grooved design ensures excellent lubrication to the connecting rods, while enhanced crush and optimized eccentricity maintain consistent oil clearance. Enlarged chamfers prevent interference with crank fillets.

This bearing set fits vehicles including 1992-1997 Mitsubishi Eclipse, 1992-1997 Lancer Evolution I-IV, 1994-2003 Galant, 1993-1996 Eagle Summit, and 1993-1995 Mitsubishi Expo/Expo LRV. Always verify journal and housing dimensions before installation to ensure proper fitment.