ARP Ring Compressor

Specialty Kit for Bore Sizes up to 3.5720 inches

Part #: 899-5720

Overview

The ARP Ring Compressor (899-5720) is a precision-engineered specialty tool designed to facilitate the installation of piston rings during engine rebuilds or assembly. Crafted by ARP, a renowned name in high-performance fasteners and engine components, this ring compressor kit is ideal for automotive enthusiasts, professional rebuilders, and engine builders who demand accuracy and durability. Whether you're working on a small block or a larger bore engine, this kit ensures a smooth, hassle-free process, helping you achieve proper ring seating and optimal engine performance.

Constructed from high-quality materials and featuring advanced CNC-machining, the ARP tapered ring compressors provide a reliable solution for installing piston rings with precision. Its true-radius design offers superior fitment compared to conventional tapered devices, reducing the risk of ring damage or misalignment. This results in better sealing, improved compression, and enhanced engine efficiency, making it an essential tool for those seeking professional-grade results.

Key Features

The ARP Ring Compressor kit boasts several innovative features that set it apart from standard tools:

• Manufactured from CNC-machined 6061-T6 billet aluminum, ensuring strength, lightweight handling, and long-lasting durability.
• True-radius design for each bore diameter provides a perfect fit, minimizing installation errors and protecting piston rings during assembly.
• Relieved to accommodate wire O-rings on the bottom, ensuring compatibility with a variety of piston designs and sealing requirements.
• Type 3 anodizing enhances corrosion resistance and surface longevity, maintaining performance even under demanding conditions.
• Prominently engraved bore size markings in 3/4 inch high numbers allow for quick identification and selection, streamlining your workflow.
• Designed for bore sizes up to 3.5720 inches, suitable for a wide range of performance and rebuild applications.
• Precision CNC machining ensures consistent quality and fitment, reducing assembly time and increasing confidence in your work.
• Lightweight yet robust construction makes handling easier during installation, especially in tight engine bays.

Construction & Design

The ARP Ring Compressor is meticulously crafted from high-grade 6061-T6 billet aluminum, a material known for its excellent strength-to-weight ratio and corrosion resistance. The CNC-machined true-radius design ensures each bore size is perfectly contoured to match piston rings, providing a snug yet gentle fit that prevents ring distortion or damage during installation. The reliefs for wire O-rings are precisely cut to accommodate various sealing configurations, making this tool versatile across different engine builds.

The Type 3 anodizing process not only enhances the aesthetic appeal with a durable, long-lasting finish but also protects the aluminum from oxidation and wear. The engraved bore size markings are clearly visible, allowing for quick and accurate identification, which is especially helpful when working with multiple bore sizes or in a busy workshop environment.

Performance & Benefits

Using the ARP Ring Compressor kit simplifies the piston installation process, ensuring rings are seated evenly and correctly within the cylinder bore. Its true-radius design minimizes the risk of ring damage, which can compromise engine sealing and longevity. The lightweight construction reduces fatigue during repetitive use, and the precise machining guarantees a consistent fit across different bore sizes.

While this tool does not directly increase horsepower or torque, it plays a crucial role in achieving optimal engine compression and performance by ensuring proper ring installation. Its durable construction and thoughtful design make it a reliable choice for both professional engine builders and serious DIY enthusiasts aiming for high-quality rebuilds.

Installation & Fitment

The ARP Ring Compressor kit is a straightforward, bolt-on tool that requires no special modifications or adjustments. Its precision-machined bore sizes fit standard piston diameters up to 3.5720 inches, making it compatible with a wide range of engine configurations. Simply select the appropriate bore size, position the compressor around the piston rings, and carefully slide the piston into the cylinder. The true-radius design ensures a smooth, even compression of the rings, facilitating proper seating without damage.

No cutting, drilling, or tuning is necessary, making this tool suitable for both professional rebuilds and home garage projects. Its durable construction ensures it will withstand repeated use without deformation or wear, providing consistent performance over time.

What's Included

• Complete ring compressor kit with CNC-machined 6061-T6 billet aluminum components
• Multiple bore size inserts up to 3.5720 inches
• Wire O-ring reliefs for versatile sealing options
• Detailed instructions for proper use and installation

Ideal For

• Engine rebuilders and professional machinists
• Performance enthusiasts working on high-performance or stock engines
• DIY mechanics seeking precision tools for piston installation
• Engine builders requiring durable, reliable ring compressors for frequent use

Emissions Note

This product is a specialty tool designed solely for engine assembly and does not impact emissions or legal compliance. It is intended for professional or off-road use only and does not carry any emissions certification or legal status.