ACL Bearings 4B1606HC-.25 High Performance Rod Bearing Set VW Audi 1.8L 2.0L .25mm Oversize CT-1 Coated

The ACL 4B1606HC-.25 is a high-performance connecting rod bearing set designed for VW/Audi 1.8L and 2.0L engines, featuring a .25mm (.010 inch) oversize diameter for use with reground crankshafts. Part of ACL's Race Series lineup, these bearings are engineered to withstand the extreme demands of high-performance and racing applications.

Advanced CT-1 Calico Coating Technology:

• Dry film lubricant coating reduces friction and abrasive wear during engine operation
• Provides critical intermittent dry lubrication during cold starts and extreme conditions
• Not affected by dust or dirt contamination
• Ultra-thin coating thickness of 0.00025" to 0.00030" (6 to 7.5 microns) maintains precise tolerances
• Increases load carrying capacity while reducing parasitic drag

Premium Tri-Metal Construction:

• Hardened steel backing provides superior strength and bearing retention in the housing
• Copper-lead alloy intermediate layer delivers exceptional strength and seizure resistance
• High-strength overlay with reduced thickness for improved fatigue properties
• Increased crush factor locks bearings securely in place, reducing risk of bearing spin
• Flash plating eliminated to maximize heat transfer and improve housing grip

Race-Proven Performance:

ACL Race Series bearings have established a worldwide reputation in motorsports, from NASCAR and Formula 1 to sport compact drift racing and drag racing competitions. The unique combination of advanced metallurgy, precision engineering, and CT-1 coating technology provides the endurance and reliability demanded by professional engine builders. Ideal for high-RPM applications, turbocharged engines, and heavily stressed powerplants where standard bearings cannot perform.

This complete rod bearing set includes all bearings required for a 4-cylinder engine rebuild. Compatible with VW/Audi 1781cc and 1984cc engines including 8-valve, 16-valve, and turbocharged variants.