ARP Studs

2011–2025 Subaru Forester / Subaru Impreza / Subaru WRX 5/16" Air Cleaner Stud Kit

Part #: 400-0302

Overview

The ARP Studs (400-0302) are high-quality air cleaner stud kits designed to enhance your vehicle's intake system. Crafted by ARP, a renowned name in performance fasteners, these studs allow you to upgrade your air filter assembly for increased airflow, which can support improved engine performance. Whether you're a daily driver, a performance enthusiast, or someone looking to optimize their vehicle's breathing capabilities, these studs provide a reliable and durable solution.

By replacing the factory studs with these polished stainless steel studs, you'll gain the ability to install a larger or more efficient air filter, helping to maximize airflow into your engine. This can contribute to better throttle response, potential horsepower gains, and improved overall engine efficiency. Designed for ease of installation, these studs are a perfect upgrade for those seeking to improve their vehicle's intake system without extensive modifications.

Key Features

ARP Studs (400-0302) feature top-quality materials and precise engineering to ensure long-lasting performance and reliable fitment. The studs are made from polished stainless steel, providing excellent corrosion resistance and a clean, professional appearance under the hood. Their 5/16" diameter and 3.200-inch length make them suitable for a variety of air cleaner assemblies, allowing for increased clearance and airflow capacity.

• Constructed from durable stainless steel with a polished finish for corrosion resistance and aesthetic appeal.
• Designed with a 5/16" thread size (both -18 and -24 thread pitches included), ensuring compatibility with most air cleaner assemblies.
• Includes a hex nut for secure fastening, simplifying installation and removal.
• Stud length of 2.70 inches provides ample space for larger filters or custom setups.
• Helps improve airflow compared to factory studs, supporting better engine breathing and performance.
• Ideal for performance upgrades, custom air intake setups, or replacing worn or damaged studs.
• Manufactured by ARP, a trusted leader in high-performance fasteners for automotive applications.

Construction & Design

The ARP air cleaner studs are precision-machined from high-quality stainless steel, ensuring strength, durability, and resistance to corrosion. The polished finish not only enhances the visual appeal but also provides an additional layer of protection against the elements. The studs feature a standard 5/16" thread size, compatible with a wide range of air filter assemblies, and are designed with a length that accommodates larger filters or custom configurations.

The inclusion of a hex nut allows for straightforward installation and removal, making maintenance or upgrades simple and efficient. These studs are engineered to withstand the rigors of daily driving and performance applications, ensuring a secure fit that maintains integrity over time.

Installation & Fitment

The ARP air cleaner studs are designed for a straightforward bolt-on installation. They replace the factory studs without the need for cutting, drilling, or complex modifications. Simply remove the existing studs, insert these ARP studs into the air cleaner assembly, and secure with the included hex nuts. No special tools beyond standard hand tools are required, and the process can typically be completed in minutes.

• Easy, bolt-on installation with no cutting or drilling required.
• Compatible with most 5/16" threaded air cleaner assemblies on Subaru models from 2011 to 2025.
• Includes all necessary hardware for a complete upgrade.

What's Included

• One set of polished stainless steel air cleaner studs (length: 2.70 inches, thread size: 5/16" -18 and -24)
• Hex nuts for secure fastening

Ideal For

• Performance enthusiasts seeking to upgrade their air intake system
• Owners looking to support larger or more efficient air filters
• DIY mechanics and tuners aiming for a reliable, long-lasting hardware upgrade
• Anyone wanting to improve airflow and engine response with quality fasteners