King Engine Bearings XP Series Main Bearing Set Undersize

King Engine Bearings XP Series main bearing sets are tri-metal crankshaft main bearings built for high-load, sustained-stress engines, including road racing, circle track and other competition use. This undersize line is made for crankshafts that have been machined below standard journal diameter. It gives engine builders a precision-made option when rebuilding or building a performance engine.

Key Features:

• Tri-metal construction: a copper/lead layer and a nickel barrier layer sit over a steel backing. A lead/tin/copper Babbitt overlay adds durability and load capacity.
• SecureBond adhesion process: bonds the layers together for stability and durability under heavy load.
• Improved oiling: enlarged, chamfered oil holes are available with full, 3/4 or 1/2 grooving, depending on the application.
• Narrowed design: the bearings are narrowed to clear large-radius crankshafts.
• Tight tolerances: King holds close control over wall thickness for consistent bearing clearances.
• Undersize availability: the line covers a range of crankshaft undersizes for popular domestic and import engine families.

King Engine Bearings has made nothing but engine bearings since 1960. XP Series main bearings are designed for engine builders who need dependable, high-load protection for the crankshaft. Select the correct part number for your engine and crankshaft journal size.