King Engine Bearings Bi-Metal Silicon Aluminum Main Bearing Set

2004–2006 Toyota Scion xA / 2004–2006 Toyota Scion xB 1NZ-FE Engine (Size STD)

MB5759SI

Overview:

The King Engine Bearings Bi-Metal Silicon Aluminum Main Bearing Set is engineered specifically for the Toyota Scion xA and xB models from 2004 to 2006, equipped with the 1NZ-FE engine. Designed to meet or exceed OEM specifications, this main bearing set provides reliable support for your engine’s crankshaft, ensuring smooth operation and durability under demanding conditions.

Ideal for daily drivers and performance enthusiasts alike, these bearings help maintain optimal engine performance by reducing friction and wear. Whether you are rebuilding your engine or upgrading for enhanced reliability, this bearing set offers a precision fit and long-lasting protection.

Key Features:

This main bearing set combines advanced materials and manufacturing techniques to deliver dependable performance and durability:

• Constructed from bi-metal silicon aluminum alloy for excellent strength and wear resistance.
• Designed to provide a precise fit for the 1NZ-FE engine in Toyota Scion xA and xB models (2004–2006).
• Standard size (STD) bearings ensure compatibility with factory crankshaft dimensions.
• Optimized surface finish reduces friction and improves oil film retention for enhanced engine longevity.
• Manufactured to meet or exceed OEM quality standards for reliable performance.
• Ideal for engine rebuilds, repairs, or performance upgrades requiring durable main bearings.

Construction & Design:

The bi-metal silicon aluminum composition of these main bearings offers a balanced combination of toughness and conformability. The silicon aluminum layer provides excellent fatigue resistance and load-carrying capacity, while the bi-metal backing ensures structural integrity and dimensional stability under high stress.

Precision manufacturing processes guarantee tight tolerances and consistent quality, which are critical for maintaining proper crankshaft alignment and minimizing engine wear. This design helps your engine maintain smooth rotation and reduces the risk of bearing failure during operation.

Installation & Fitment:

This main bearing set is designed as a direct replacement for the factory bearings in the 1NZ-FE engine found in 2004–2006 Toyota Scion xA and xB models. Installation requires standard engine rebuild procedures and should be performed by a qualified technician to ensure proper clearances and alignment.

• Fits 2004–2006 Toyota Scion xA and xB with 1NZ-FE engine.
• Standard size bearings match OEM crankshaft dimensions.
• No modifications to engine components are necessary.

What’s Included

• Complete set of bi-metal silicon aluminum main bearings in standard size for 1NZ-FE engine.

Ideal For:

This bearing set is perfect for:

• Engine rebuilds and overhauls on Toyota Scion xA and xB (2004–2006).
• Enthusiasts seeking reliable, OEM-quality main bearings for daily driving or light performance use.
• Mechanics and shops performing maintenance or repairs on 1NZ-FE engines.
• Anyone requiring durable, precision-fit main bearings to ensure smooth engine operation and longevity.

King Engine Bearings specializes in engine bearings with a strong footprint in performance and racing, developing advanced bearing materials and designs for high-load engines. Builders and racers rely on King for main and rod bearings engineered to handle higher cylinder pressures and sustained RPM without sacrificing reliability.