Standard Main Bearing Set OEM Glyco Alloy With Calico CT-1 Coating CT-1 Is A Dry Film Lubricant Coating That Helps Reduce Friction And Abrasive Wear. It Provides Intermittent Dry Lubrication And Is Not Affected By Dust Or Dirt. CT-1 Is Specifically Engineered To Withstand The Extreme Conditions Of Today's High-Performance Engines. Professional Engine Builders Enjoy A Higher Level Of Confidence With Increased Embed-ability - Strength And Durability.1978-1989 Porsche 911 SC 3.0L / Carrera 3.2L / 930 Turbo 3.3L 1989-1994 Porsche 964 C2 / C4 / Turbo (965)1995-1998 Porsche 993 C2 / C4 / Turbo1999-2005 Porsche 996 Turbo2004-2005 Porsche 996 GT3Patrick Motorsports USA OEM/OES Glyco / Calico Coatings - Sold As A Set - 1 Set Per Car NOTE: Thickness Variance After CT1 Coating = 0.0001" To 0.0005"Alternate Part Numbers: ENG 964 101 901 00 CT1 / 964-101-901-00-CT1 / ENG.964.101.901.00CT1 / 96410190100CT1 / 964-101-901-00 / 964.101.901.00 / 96410190100 05/07/2026