King XP Series Main Bearing Set, STD With .001" Extra Clearance Suit Dart LS Next Block, Grooved Upper Half & Plain Lower Half (KBMB5777XP STDX)

Today?s race engines make more power than ever before. Yesterday?s engine bearing load capacity no longer works today? and tomorrow?s race engines will be even more powerful. There?s a need to meet these demands with higher bearing design standards and improved materials.

King Racing?s XP series of rod and main bearings was developed to meet these challenges through technologically advanced geometrical features and a unique metal structure. Together, they drive the industry to a new level of durability and performance.

A unique tri-metal structure developed to meet the ongoing demand for increased engine bearing load capacity

• 24% stronger overlay
• 17% more fatigue resistance
• SecureBond - A micro-etch process that improves multi-layer adhesion and structural integrity
• Compatible with all crankshafts

Intermediate layer:

• Copper based alloy strengthened by 4.5% tin
• Industry?s highest hardness level - 115HV
• Load capacity - 17,000 PSI

Overlay:

• Strengthened by 5% copper
• Industry?s highest hardness level - up to 18.1HV
• Fatigue resistance - 10,200 PSI