Brian Crower Billet Crankshaft

2005–2010 Scion tC / 2008–2015 Scion xB2 2AZ-FE Engine

BC5349

Overview:

The Brian Crower 2AZFE Billet Crankshaft is a precision-engineered performance upgrade designed specifically for the Scion tC (2005–2010) and Scion xB2 (2008–2015) equipped with the 2AZ-FE engine. Crafted for enthusiasts seeking enhanced durability and reliability under high horsepower, high boost, and high RPM conditions, this crankshaft delivers exceptional strength and longevity. Whether you are building a naturally aspirated or forced induction setup, this crankshaft provides a solid foundation for your engine’s internal components.

Manufactured from aerospace-grade 4340 steel billet, the BC5349 crankshaft offers superior toughness and fatigue resistance compared to standard cast or forged units. Its design focuses on rigidity and smooth operation, making it an ideal choice for performance builds that demand precision and durability.

Key Features:

This billet crankshaft incorporates advanced engineering features that optimize performance and reliability:

• Constructed from premium aerospace-grade 4340 steel billet for maximum strength
• CNC machined on state-of-the-art 5-axis Mazak Integrex 300-IV machines to exacting tolerances of ±0.0001"
• Large radius journals increase rigidity and reduce stress under high load conditions
• Gun drilled and CNC ground oil passages with smooth surfaces for enhanced lubrication
• Tear-dropped oil scoops and cross-drilled holes prioritize oil flow to rod bearings
• Micro-polished journal surfaces provide optimum bearing lubricity and reduce wear
• Fully stress relieved and shot peened to improve fatigue resistance
• Magnaflux inspected to ensure structural integrity and defect-free construction
• Multi-step nitriding heat treatment enhances surface hardness and wear resistance
• Fully profiled counterweights reduce windage losses, improving RPM potential and engine efficiency

Construction & Design:

The BC5349 crankshaft is meticulously crafted from 4340 steel billet, a material renowned for its high tensile strength and toughness, commonly used in aerospace and motorsport applications. The manufacturing process employs advanced CNC machining on 5-axis Mazak Integrex 300-IV equipment, ensuring precision and consistency across every unit.

Each crankshaft undergoes a comprehensive multi-step heat treatment process including stress relieving, shot peening, and nitriding. These treatments enhance the crankshaft’s durability by reducing residual stresses, increasing surface hardness, and improving resistance to fatigue and wear. The journals are micro-polished to a mirror finish, minimizing friction and promoting superior bearing life.

The design features large radius journals and fully profiled counterweights to optimize strength and reduce internal engine drag. Gun drilled oil passages and tear-drop shaped oil scoops ensure efficient lubrication, critical for high-performance and high-RPM applications.

Installation & Fitment:

This crankshaft is a direct fit replacement for the 2AZ-FE engine found in the 2005–2010 Scion tC and 2008–2015 Scion xB2 models. Installation requires standard engine assembly procedures and should be performed by a qualified technician or experienced engine builder to ensure proper clearances and torque specifications. No modifications to the engine block or ancillary components are typically necessary.

It is recommended to inspect and replace related engine internals such as bearings and seals during installation to maximize reliability and performance.

What's Included:

• Brian Crower 2AZFE Billet Crankshaft (Part # BC5349)

Ideal For:

This billet crankshaft is ideal for Scion enthusiasts and engine builders who demand a robust, high-quality rotating assembly component capable of handling increased power levels and aggressive driving conditions. It suits naturally aspirated builds aiming for higher RPM limits as well as forced induction setups requiring enhanced strength and durability.

Brian Crower (BC) supplies performance engine internals and valvetrain components aimed at serious builds, including stroker kits and rotating assemblies. Known for system-matched parts designed to work together, BC products are a go-to for enthusiasts chasing more displacement, higher RPM capability, and stronger bottom-end reliability in high-output street or track applications.