King Engine Bearings MB639XP.026 XP-Series Performance Main Bearing - Set

The King Engine Bearings MB639XP.026 is a high-performance XP-Series main bearing set engineered for Audi 2.5 TFSI five-cylinder turbocharged engines. This bearing set is designed for .026mm (.001 inch) undersize crankshafts, making it ideal for engines that have undergone crankshaft regrinding or precision machining.

Advanced XP-Series Construction:

• Enhanced tri-metal design with layered copper-lead construction
• Nickel plate barrier with lead/tin/copper Babbitt overlay on steel backing
• Superior stability and durability for high-performance applications
• Extremely tight wall thickness tolerances of +/-.0001 inch for precise fitment
• Narrowed design for large-radius crankshafts
• Enlarged, chamfered oil holes for improved lubrication

Key Features:

• High load capacity designed for extreme performance racing conditions
• Proven track-tough construction handles high horsepower builds
• Consistent and reliable performance under demanding conditions
• Race-proven Xtreme Performance (XP-Series) Tri-Lecular technology

King Engine Bearings specializes exclusively in engine bearing manufacturing, ensuring the highest quality precision bearings available. The XP-Series represents King's most advanced bearing technology for serious performance and racing applications where reliability under extreme loads is critical.