ACL Bearings 4B1609HX-STD Race Series Rod Bearings VW 1.4L 1.6L 1.8T 2.0 TSI TFSI +.001" Oil Clearance

ACL Bearings 4B1609HX-STD Race Series connecting rod bearings are engineered for high-performance Volkswagen and Audi 4-cylinder engines, including 1.4L, 1.6L, 1.8T, 2.0 TSI, and 2.0 TFSI applications. These bearings feature an increased oil clearance of +.001" (HX designation) compared to standard clearance, making them ideal for performance builds, turbo upgrades, and high-RPM racing applications.

Key Features:

• Premium F781 trimetal bearing material for superior durability
• High-strength overlay plate with reduced thickness for improved fatigue resistance
• Hardened steel backing for enhanced support and bearing retention
• Improved heat conduction and transfer through optimized design
• Enhanced oil groove design for better oil distribution and lubrication
• Increased eccentricity to compensate for bore distortion at high RPM
• Tight wall tolerances for consistent bearing clearances
• Standard size bearings with identical bearing halves

Technical Specifications:

• Overall Length: 0.748 inches (19mm)
• Shaft Size Range: 1.8802" - 1.881" (47.758mm - 47.778mm)
• Tunnel Size: 1.9921" - 1.9929" (50.6mm - 50.619mm)
• Vertical Oil Clearance: 0.0015" - 0.0037" (0.038mm - 0.093mm)
• Wall Thickness at Crown: 0.0548 inches (1.392mm)
• Bearing Material: F781 trimetal construction

ACL Race Series bearings are trusted by professional engine builders and racers worldwide for their proven performance in high-stress, high-RPM conditions. The HX-STD designation indicates standard bearing size with extra oil clearance, perfect for modified engines requiring precise bearing tolerances.