ARP Chevrolet LT1 6.2L Small Block 12pt Header Bolt & Stud Kit

2013–2025 Chevrolet Small Block V8 (LT1) 6.2L

Part #: 434-1103

Overview

The ARP Chevrolet LT1 6.2L Small Block Header Bolt & Stud Kit is designed for automotive enthusiasts and professional builders seeking to maximize the durability and reliability of their header installation. Crafted with advanced fastener technology, this kit ensures a secure, long-lasting connection between your header flanges and exhaust system, even under demanding conditions. Whether you're building a high-performance street machine or a track-ready beast, these bolts and studs provide the strength and precision fit you need to support your vehicle's power upgrades.

Engineered specifically for 2013 and newer Small Block Chevrolet LT1 6.2L V8 applications, this kit offers a significant upgrade over standard hardware, helping to prevent header leaks and maintain optimal exhaust flow. With ARP's reputation for quality and strength, you'll get peace of mind knowing your header assembly is secured with fasteners rated at 180,000 psi tensile strength, far exceeding typical grade 8 hardware. This ensures your engine's performance and reliability are preserved during spirited driving or extended track sessions.

Key Features

Designed for high-performance applications, the ARP header bolt and stud kit features several key technological advancements:

• Rated at 180,000 psi tensile strength, providing unmatched durability and resistance to fatigue under high heat and stress conditions.
• Available in two finishes: Black Oxide hex or 12 point, offering corrosion resistance and a sleek appearance, or rust-free Stainless steel hex or 12 point heads for maximum longevity and aesthetic appeal.
• 30mm length bolts tailored for 3/8-inch thick header flanges, ensuring proper engagement and secure fastening.
• Includes washers to distribute load evenly and prevent damage to header flanges during installation.
• Precision-machined threads and high-quality materials ensure a perfect fit and easy installation, reducing the risk of stripping or cross-threading.
• Compatible with a wide range of aftermarket and OEM headers designed for the LT1 6.2L engine, making it a versatile choice for various build configurations.
• Manufactured by ARP, a global leader in high-performance fasteners, known for their rigorous quality control and innovative engineering.
• Ideal for use in street, strip, or track environments where maximum strength and reliability are essential.

Construction & Design

The ARP header bolt and stud kit is constructed from premium-grade materials, featuring alloy steel that is heat-treated to achieve exceptional tensile strength. The bolts and studs are precision-machined to exact specifications, ensuring a consistent and secure fit. The inclusion of washers helps distribute clamping force evenly across the header flange, reducing the risk of warping or leaks. The available finishes—Black Oxide and stainless steel—provide excellent corrosion resistance, even in high-temperature exhaust environments. The 12 point head design allows for easier installation and removal in tight spaces, while the hex head options provide a traditional, robust grip for torque application. Overall, the design emphasizes durability, ease of installation, and long-term performance, making it a reliable upgrade for your header assembly.

Installation & Fitment

The ARP header bolt and stud kit is designed for straightforward, bolt-on installation. The fasteners are compatible with OEM and aftermarket headers for the Chevrolet LT1 6.2L engine, with no modifications typically required. The 30mm length bolts are suitable for 3/8-inch thick header flanges, ensuring a proper fit. Due to the high-quality machining and precise thread engagement, installation is simplified, and the risk of cross-threading is minimized. No special tools beyond standard socket and wrench sets are necessary. The kit is ideal for both professional mechanics and experienced DIY enthusiasts seeking a reliable upgrade to their header assembly.

What's Included

• High-strength header bolts (quantity as specified for your application)
• Header studs (quantity as specified)
• Washers for each fastener
• Complete hardware for secure header attachment

Ideal For

• Performance street builds
• Track and racing applications
• Engine rebuilds and upgrades
• Enthusiasts seeking durable, high-quality fasteners for header installation