ARP Front Mandrel Bolt Kit

2011–2025 Subaru Forester / Subaru Impreza / Subaru WRX / Subaru STI 2.0L Turbo

Part #: 330-0703

Overview

The ARP Front Mandrel Bolt Kit is a high-performance fastener solution designed specifically for your vehicle's front drive mandrels. Engineered with precision and durability in mind, these bolts are ideal for automotive enthusiasts and professionals seeking reliable, high-strength hardware for demanding applications. Whether you're performing a rebuild, upgrade, or routine maintenance, this bolt kit ensures your front mandrels are secured with components that meet or exceed OEM standards.

Constructed from ARP's renowned high-strength 8740 chromoly steel, these mandrel drive bolts provide exceptional tensile strength and durability. The shot-peened finish enhances fatigue life and resists wear, making them suitable for both street and track use. Designed with extended lengths and underhead features, these bolts facilitate full thread engagement and optimal clamping force, ensuring your front drive components stay securely in place under high loads and spirited driving conditions.

Key Features

The ARP Front Mandrel Bolt Kit offers several technical advantages that make it a top choice for performance applications:

• High-Strength Material: Manufactured from ARP's proprietary 8740 chromoly steel, these bolts deliver superior tensile strength and toughness, supporting increased horsepower and torque.
• Shot-Peened Finish: The shot-peening process enhances fatigue resistance and overall durability, extending the service life of the fasteners.
• Extended Lengths: Designed with an underhead length of 6.250 inches, these bolts provide full thread engagement, ensuring maximum holding power and reducing the risk of loosening under vibration.
• Undercut Design: The undercut feature allows for necessary stretch and flexibility, maintaining proper tension and clamping force during thermal cycles and dynamic loads.
• 12-Point Fastener Head: The 12-point head style facilitates easier installation and removal in tight spaces, providing better torque application and reducing the risk of stripping.
• Precision Manufacturing: ARP's meticulous manufacturing process guarantees consistent quality, precise thread engagement, and reliable performance.
• Application Versatility: Suitable for various front drive mandrel applications across Subaru models and other compatible vehicles requiring high-strength fasteners.

Construction & Design

The ARP Front Mandrel Bolt Kit is crafted from premium 8740 chromoly steel, a material renowned for its exceptional strength-to-weight ratio and fatigue resistance. The bolts are shot-peened to improve surface hardness and reduce the likelihood of stress fractures, ensuring longevity even under aggressive driving conditions. The extended length and undercut design are carefully engineered to maximize thread engagement and flexibility, providing a secure fit that withstands thermal expansion and contraction.

The 12-point head design allows for easier access in confined spaces, enabling precise torque application without damaging the fastener. Each bolt is manufactured with tight tolerances to ensure compatibility and consistent performance, making them a reliable upgrade over standard hardware.

Installation & Fitment

The ARP Front Mandrel Bolt Kit is a direct bolt-on replacement for your vehicle's original fasteners. No cutting, drilling, or complex modifications are required. Proper torque specifications should be followed during installation to ensure optimal clamping force and safety. The bolts are compatible with OEM mandrel hardware and are designed to fit precisely, providing a straightforward installation process suitable for both DIY enthusiasts and professional mechanics.

• Easy to install with standard hand tools
• No special tuning or adjustments needed
• Designed for high-performance and reliability in demanding conditions

What's Included

• Complete set of ARP Front Mandrel Drive Bolts (330-0703)
• Installation instructions

Ideal For

• Performance enthusiasts upgrading front drive components
• Rebuilds and repairs requiring high-strength fasteners
• Track day and spirited driving applications
• Vehicles subjected to high loads and vibrations