ARP Header Bolt Kits

2010–2025 Subaru Forester / Subaru Impreza / Toyota 3.8 in.-16 Header Bolt & Stud Kit

Part #: 400-1105

Overview

The ARP Header Bolt Kits are specially designed fasteners engineered to provide superior strength and durability for your vehicle's header installation. Crafted from high-quality stainless steel, these bolts are an excellent choice for automotive enthusiasts seeking reliable, corrosion-resistant hardware that can withstand the demanding conditions of high-performance applications. Whether you're upgrading your exhaust system or performing routine maintenance, these header bolt kits ensure a secure and lasting fit, helping you achieve optimal engine performance.

Designed for both professional mechanics and passionate DIYers, the ARP Header Bolt Kits simplify the installation process while offering peace of mind that your headers are firmly secured. Their robust construction helps prevent loosening due to engine vibrations and thermal cycling, ensuring consistent performance and reducing the risk of exhaust leaks. If you value quality, strength, and corrosion resistance, these bolt kits are an essential addition to your automotive toolkit.

Key Features

The ARP Header Bolt Kits feature several technical advantages that set them apart from standard hardware. Made from premium stainless steel, these bolts are 15 percent stronger than traditional Grade 8 steel fasteners, providing increased resistance to stretching and failure under high-stress conditions. The compact head design allows for easy installation in tight engine bay spaces, making it easier to access those hard-to-reach header bolts.

• High-strength stainless steel construction offers excellent corrosion and heat resistance, ensuring longevity even in extreme conditions.
• 15% stronger than Grade 8 steel, providing enhanced durability and reliability for high-performance applications.
• Compact head design with a 12-point and hex-style options allows for versatile installation in confined spaces.
• Underhead length of 0.750 inches (19.00 mm) ensures proper thread engagement and secure fastening.
• Precision-machined threads and polished finish contribute to smooth installation and a professional appearance.
• Designed to withstand high temperatures and engine vibrations, maintaining torque integrity over time.

Construction & Design

The ARP Header Bolt Kits are manufactured from high-grade stainless steel, which provides exceptional strength and corrosion resistance. The bolts feature a compact head design, enabling installation in tight engine compartments where space is limited. The 12-point and hex-style head options give flexibility for different tools and access scenarios, ensuring ease of installation and removal.

Each bolt is precision-machined to exact specifications, ensuring a perfect fit and consistent torque application. The polished finish not only enhances appearance but also helps resist corrosion from moisture, road salts, and high temperatures. These design features collectively contribute to a durable, reliable fastening solution that maintains its integrity over the lifespan of your vehicle.

Installation & Fitment

The ARP Header Bolt Kits are designed for straightforward, bolt-on installation. They are compatible with a variety of vehicles, including Subaru Forester, Subaru Impreza, and Toyota models from 2010 to 2025, that utilize 3/8 in.-16 header bolts. No special tools or modifications are typically required, and the bolts can be installed using standard hand tools.

Thanks to their compact head design, these bolts fit into tight spaces where traditional bolts might be difficult to access. Their high-quality construction ensures that once installed, they will maintain proper tension and secure fitment, reducing the need for frequent re-tightening. Always follow manufacturer torque specifications for optimal results.

What's Included

• Complete set of header bolts and studs in the specified size and style
• All necessary hardware for installation
• Instruction sheet for proper torque and installation procedures

Ideal For

• Performance enthusiasts upgrading or replacing header hardware
• Professional mechanics seeking reliable, corrosion-resistant fasteners
• DIYers performing header installation or maintenance
• Vehicles exposed to harsh environments requiring durable hardware