King Engine Bearings MB5554XP STDX XP-Series Toyota 3SGTE Main Bearing Set

The King Engine Bearings MB5554XP STDX is an XP-Series crankshaft main bearing set designed for the Toyota 3SGTE 16-valve 2.0L engine.

XP-Series Tri-Metal Construction:

• Tri-metal copper lead design featuring a layered copper lead intermediate, nickel plate barrier, and a lead/tin/copper Babbitt overlay on a steel backing
• pMaxBlack™ nano-scaled overlay engineered to withstand up to 10,200 PSI load in the overlay and 17,000 PSI in the intermediate layer
• Narrowed bearing profile designed for large-radius crankshafts (narrow rod bearing applications)
• Enlarged, chamfered oil holes with 1/2 grooving on main bearings for improved oil flow and uncompromised lower bearing load capacity
• Bull's Eye Tolerance™ technology — wall thickness held to an industry-leading ±.0001 in. tolerance for precise oil clearance control

Size & Clearance:

• Size: STDX — Standard crankshaft journal size with .001" extra oil clearance
• STDX is thinner than standard to provide increased oil clearance on a stock (unturned) crankshaft journal
• Cross-reference: ACL 5M8361HX-STD

King Part Number Key:

• MB — Main Bearing Set
• XP — Tri-metal copper lead construction (XP-Series)
• STD — Standard crankshaft journal size (no undergrind)
• X — .001" extra oil clearance

Ideal for circle track, drag racing, off-shore, and other demanding motorsport applications requiring steel crankshaft compatibility. The XP-Series delivers proven performance for high-load, endurance-style builds where standard bearings fall short.