ARP Main Stud Kit

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

203-5401

Overview:

The ARP 2AZFE Main Stud Kit is a premium engine upgrade designed specifically for the Scion tC (2005–2010) and Scion xB2 (2008–2015) equipped with the 2AZ-FE engine. This kit replaces the factory main bolts with high-strength ARP Pro Series ARP2000 studs, providing superior clamping force and durability. Ideal for enthusiasts seeking enhanced engine reliability and performance, these studs ensure the main caps remain securely fastened under increased stress and high RPM conditions.

Engine builders and performance tuners trust ARP studs for their exceptional quality and precision engineering. The 2AZFE Main Stud Kit is perfect for those upgrading their engine internals or preparing their vehicle for track use, forced induction, or other demanding applications.

Key Features:

Engineered for strength, durability, and precision fitment, the ARP 2AZFE Main Stud Kit offers the following key features:

• Constructed from premium grade 8740 chromoly alloy, exceeding aircraft quality standards
• Heat-treated to an impressive 220,000 psi tensile strength for maximum durability
• Centerless ground for exceptional straightness and concentricity, ensuring perfect alignment
• Thread-rolled after heat treatment to increase fatigue strength by approximately 1000%
• Precision manufacturing tolerances allow gaskets and cylinder heads to glide into place effortlessly
• Designed specifically for the Scion 2AZ-FE engine to guarantee proper fit and function
• Ideal for high-performance builds, forced induction setups, and extended engine life
• Corrosion-resistant finish for long-lasting reliability

Construction & Design:

The ARP 2AZFE Main Stud Kit is manufactured from premium 8740 chromoly alloy, a material known for its superior strength and toughness compared to standard fastener steels. This alloy undergoes a rigorous heat treatment process to achieve a tensile strength of 220,000 psi, ensuring the studs can withstand extreme engine loads without stretching or failing.

Following heat treatment, each stud is centerless ground through multiple precise cuts to achieve near-perfect straightness and concentricity. This meticulous process ensures that the studs align flawlessly with the engine block and main caps, reducing the risk of gasket damage and improving sealing integrity. Additionally, the threads are rolled after heat treatment, significantly enhancing fatigue resistance and longevity compared to studs threaded before heat treatment.

Installation & Fitment:

The ARP 2AZFE Main Stud Kit is a direct fit replacement for the factory main bolts on 2005–2010 Scion tC and 2008–2015 Scion xB2 models equipped with the 2AZ-FE engine. Installation requires standard engine disassembly procedures, including removal of the oil pan and main caps. Due to the precision manufacturing of ARP studs, cylinder heads and gaskets will align smoothly during reassembly, simplifying installation and reducing the risk of misalignment.

It is recommended that installation be performed by a professional or experienced technician familiar with engine internals to ensure proper torque specifications and assembly procedures are followed for optimal performance and reliability.

What's Included:

• ARP Pro Series ARP2000 Main Studs for 2AZ-FE engine
• Installation instructions

Ideal For:

This main stud kit is ideal for Scion tC and xB2 owners who are:

• Building or rebuilding their 2AZ-FE engine for increased reliability
• Upgrading to forced induction or higher horsepower applications
• Seeking improved engine durability for track or spirited driving
• Replacing worn or damaged factory main bolts with a stronger alternative