ARP Universal Bolt 1/4-20 Thread 4 in Long Stainless Steel 5‑Piece Set

Description

Product Overview

ARP has built a reputation for delivering precision‑engineered fasteners that meet the demanding needs of high‑performance automotive applications. The Universal Bolt 1/4-20 × 4‑inch set continues that tradition, offering five stainless steel header bolts that combine strength, durability, and a polished finish for a professional appearance.

Each bolt is machined from premium grade stainless steel, providing excellent resistance to corrosion, heat, and the harsh chemicals often encountered in exhaust systems. The 1/4‑20 thread size is a standard fit for many performance headers, ensuring a secure connection without the need for custom adapters.

The 4‑inch length gives ample engagement depth, allowing the bolt to clamp firmly to the header flange while maintaining proper clearance for surrounding components. The polished finish not only adds a sleek visual element but also reduces the likelihood of surface oxidation, extending the service life of the fastener.

All five bolts are packaged together in a compact, lightweight box weighing just 0.4 pounds, making them easy to store and transport. The set is identified by the part number 611‑4000, which matches the original equipment manufacturer (OEM) specifications for a wide range of exhaust header installations.

Designed for both professional mechanics and dedicated hobbyists, these bolts are compatible with a variety of exhaust header brands and models. Whether you are upgrading a street car, building a track‑ready machine, or performing routine maintenance, the ARP Universal Bolt set provides the confidence of a secure, long‑lasting connection.

In addition to the core specifications, the bolts feature a machined exterior that enhances grip during installation, reducing the chance of slippage. The combination of material quality, precise threading, and thoughtful design makes this set a reliable choice for demanding performance environments.

Usage

These bolts are ideal for installing or replacing exhaust headers on performance vehicles, including sports cars, muscle cars, and race‑prepared machines. Their stainless steel construction ensures they can withstand the high temperatures generated by exhaust gases without losing tensile strength.

When mounting a new header, the bolts should be tightened to the manufacturer’s torque specifications using a calibrated torque wrench. This ensures a proper seal and prevents warping of the header flange, which could lead to exhaust leaks or reduced performance.

The polished finish makes the bolts suitable for visible installations where aesthetics matter, such as custom builds where the header bolts are exposed. Their sleek appearance complements the overall look of a high‑end exhaust system.

Because the bolts are universal, they can be used across multiple makes and models, simplifying inventory for shops that service a variety of vehicles. They are also an excellent replacement for worn or damaged OEM bolts, restoring the original performance characteristics of the exhaust system.

Why Choose Us

ARP’s commitment to quality control means each bolt undergoes rigorous testing for tensile strength, corrosion resistance, and dimensional accuracy. This ensures that every set meets the exacting standards required for high‑performance applications.

Our bolts are manufactured in a controlled environment that minimizes contamination, guaranteeing a consistent polished finish and reliable thread engagement. This level of precision reduces the risk of thread stripping or bolt failure under extreme conditions.

We stand behind our products with a dedicated customer support team ready to assist with installation guidance, technical specifications, and warranty inquiries. Our after‑sales service is designed to give you peace of mind throughout the life of the product.

Choosing ARP means selecting a brand trusted by professional racing teams and automotive enthusiasts worldwide. The combination of engineering expertise, material selection, and meticulous production processes results in a fastener that performs when it matters most.

Key Features

• Five stainless steel bolts provide a complete set for quick installation or replacement.
• 1/4‑20 thread and 4‑inch length ensure a secure fit for a wide range of performance headers.
• Polished finish offers corrosion resistance and a professional appearance.
• Machined exterior enhances grip during tightening, reducing the chance of slippage.
• Backed by ARP’s customer support and warranty for reliable after‑sales service.

FAQ

What makes stainless steel preferable for exhaust header bolts?

Stainless steel resists corrosion caused by moisture and exhaust gases, maintains strength at high temperatures, and offers a longer service life compared to standard steel fasteners.

Can these bolts be used on non‑performance vehicles?

Yes, the universal 1/4‑20 thread size fits many standard exhaust headers, making them suitable for both high‑performance and everyday passenger cars that require reliable fastening.

Do I need any special tools to install the ARP Universal Bolt set?

A standard torque wrench and appropriate socket size are sufficient. Follow the vehicle’s torque specifications to achieve the correct clamping force without over‑tightening.

How does the polished finish affect bolt performance?

The polished surface reduces the likelihood of oxidation and provides a smoother interface, which helps maintain a consistent seal and improves the overall aesthetic of the installation.

What warranty does ARP provide for these bolts?

ARP offers a limited warranty covering material defects and manufacturing errors. Contact ARP customer service with your purchase details for assistance and replacement if needed.