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Engineered for high-performance applications, the ACL Race Series HX Main Bearing Set provides increased oil clearance and superior durability under high RPM conditions. Designed with a high-strength trimetal construction and a reduced-thickness overlay plate, these bearings offer improved fatigue resistance, enhanced crush retention, and excellent heat transfer – critical for competitive motorsport or demanding engine builds.
HX Series with Extra Oil Clearance: Additional 0.025mm clearance ideal for high-performance and high-RPM builds.
Trimetal Construction: Combines strength and wear resistance for reliable operation under extreme conditions.
High-Strength Overlay Plate: Reduced thickness improves fatigue strength and bearing life.
Hardened Steel Backing: Reinforces bearing support and housing retention.
Improved Heat Dissipation: Flash plating elimination enhances heat transfer and bearing-to-housing grip.
3/4 Grooved Design: Optimizes oil flow and load distribution to the conrod bearings.
Precision Manufacturing: Tight wall tolerances for consistent clearances and increased eccentricity for bore distortion compensation.
Chamfered Edges: Enlarged ID chamfers accommodate high-performance crankshaft fillets.
Size: STD
Tunnel Diameter: 61.000 – 61.021 mm
Shaft Diameter: 56.985 – 57.000 mm
Max Wall Thickness: 1.977 mm
Max Length: 20.63 mm
Half Type: Upper and Lower
Weight: 0.30 kg
Note: Use with ACL thrust washers P/N 1T1219
Compatible with a wide range of Mitsubishi, Fiat, and Hyundai models equipped with 4G63, 4G64, or 4G69 engines, including:
Mitsubishi Lancer Evolution I–IX (4G63-T)
Mitsubishi Eclipse (2.0/2.4L DOHC/SOHC)
Mitsubishi Galant, Outlander, Delica, L200, L300, L400 (2.0/2.4L)
Mitsubishi Space Wagon, Space Runner, Santamo, Grandis, Sapporo
Hyundai Stellar 2.0 8V (4G63)
Fiat Fullback 2.4L (4G64)
For full compatibility, refer to the detailed vehicle fitment list or consult your engine specifications.
1x Main Bearing Set (HX Extra Oil Clearance, STD Size)
Includes upper and lower bearing halves
