ARP Ring Compressor

Specialty Kit for Bore Sizes up to 3.870 inches

Part #: 899-8700

Overview

The ARP Ring Compressor (899-8700) is a precision-engineered specialty tool designed to facilitate the installation of piston rings during engine rebuilds and assembly. Crafted by ARP, a trusted name in high-performance fasteners and engine components, this ring compressor kit is ideal for professional engine builders, performance enthusiasts, and anyone seeking reliable, durable tools for accurate piston installation. Its specialized design ensures a smooth, hassle-free process, reducing the risk of ring damage or piston scoring, and helping you achieve optimal engine performance.

Constructed from high-quality materials and featuring advanced CNC-machining, the ARP ring compressor kit provides a perfect fit for bore sizes up to 3.870 inches. Whether you're working on a small-block V8, a high-performance four-cylinder, or other engine configurations, this tool offers the precision and durability needed for demanding applications. Its thoughtful design makes piston installation quicker, easier, and more consistent, supporting your goal of building a reliable, high-performance engine.

Key Features

The ARP Ring Compressor (899-8700) boasts several key features that set it apart from conventional tools:

• Manufactured from CNC-machined 6061-T6 billet aluminum for exceptional strength and lightweight handling.
• True-radius design for each bore diameter ensures a perfect, uniform compression of piston rings, reducing installation stress and potential damage.
• Relieved to accommodate wire O-rings on the bottom, making it suitable for a variety of piston designs and sealing requirements.
• Type 3 anodizing provides a long-lasting, corrosion-resistant finish that withstands the rigors of engine assembly and maintenance.
• Clear, prominent engraving of bore sizes in 3/4 inch high numbers allows for quick identification and selection, streamlining your workflow.
• Designed for bore sizes up to 3.870 inches, making it versatile for many engine rebuild projects.
• Precision CNC machining ensures tight tolerances and a consistent fit, promoting ease of use and accuracy.
• Lightweight yet durable construction reduces fatigue during repetitive use, ideal for professional shops and serious hobbyists.
• Compatible with a wide range of piston and ring sizes, supporting various engine configurations and rebuilds.

Construction & Design

The ARP Ring Compressor kit is meticulously crafted from high-grade 6061-T6 billet aluminum, known for its excellent strength-to-weight ratio and corrosion resistance. The CNC-machined process guarantees precise dimensions and a true-radius profile tailored to each bore size, ensuring a perfect fit and uniform compression of piston rings. The reliefs incorporated into the design accommodate wire O-rings, expanding its compatibility with different piston sealing systems.

The Type 3 anodized finish not only enhances durability but also provides a sleek, professional appearance. The engraved bore size markings are prominently displayed for quick identification, minimizing setup time and reducing the chance of errors during assembly. Its lightweight construction makes handling easier, especially during repetitive tasks, while maintaining the robustness needed for demanding engine builds.

Performance & Benefits

Using the ARP Ring Compressor (899-8700) simplifies the piston installation process, helping you achieve a secure, even compression of the piston rings. This precision tool reduces the risk of ring damage, piston scoring, or misalignment, which can compromise engine performance and longevity. Its true-radius design ensures that each ring is compressed uniformly, promoting proper sealing and optimal combustion efficiency.

Engine builders and performance enthusiasts will appreciate the tool’s durability and ease of use, enabling faster assembly times and more consistent results. Whether working on a high-performance street engine, a race motor, or a rebuild project, this ring compressor kit provides the reliability and precision needed for professional-quality results.

Installation & Fitment

The ARP Ring Compressor (899-8700) is a bolt-on tool that requires no special modifications or adjustments for use. Simply select the appropriate bore size, position the compressor over the piston rings, and carefully slide the piston into the cylinder bore. Its true-radius profile ensures a smooth, even compression, making installation straightforward and efficient. No cutting, drilling, or tuning is necessary, making it suitable for both professional shops and DIY enthusiasts.

What's Included

• Complete ring compressor kit with CNC-machined billet aluminum components
• Multiple bore size markings engraved for easy identification
• Reliefs for wire O-rings to accommodate various piston designs
• All necessary hardware and instructions for proper use

Ideal For

• Professional engine builders and machine shops
• Performance enthusiasts rebuilding or assembling engines
• DIY mechanics seeking high-quality, reliable tools
• Engine rebuilds requiring precise piston ring installation

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 use in professional or off-road applications where emissions regulations are not applicable.