ARP Ring Compressor

4.1650 Ring Compressor Specialty Kit for Bore Sizes 4.1650 Inches

Part #: 900-1650

Overview

The ARP Ring Compressor (900-1650) is a precision-engineered specialty tool designed to facilitate the installation of piston rings during engine rebuilds and assembly. Crafted by ARP, a renowned name in high-performance fasteners and engine components, this kit offers a reliable solution for professional engine builders and automotive enthusiasts seeking accuracy and durability. Whether you're working on a street engine, a high-performance build, or a race application, this ring compressor 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 ring compressor is built to last and provide consistent results. Its true-radius design is specifically tailored to match each bore diameter, ensuring a perfect fit and reducing the risk of ring damage or installation errors. This tool is ideal for those who demand precision and reliability in their engine assembly process, supporting a wide range of bore sizes with ease and confidence.

Key Features

The ARP 900-1650 Ring Compressor Kit incorporates several innovative features that set it apart from conventional tapered compressors:

• Manufactured from CNC-machined 6061-T6 billet aluminum, providing excellent strength, lightweight handling, and resistance to corrosion.
• True-radius design for each bore size ensures a perfect match to the piston and ring profile, promoting proper ring seating and sealing.
• Relieved to accommodate wire O-rings on the bottom, facilitating installation in engines with specific sealing requirements.
• Type 3 anodizing applied for enhanced durability and long-lasting performance, even under demanding conditions.
• Clear, prominent engraving of bore sizes in 3/4 inch high numbers for quick identification and ease of use during assembly.
• Designed for bore sizes around 4.1650 inches, making it suitable for a variety of high-performance and stock engine rebuilds.
• Precision CNC machining ensures tight tolerances and consistent quality across all bore sizes.
• Lightweight and easy to handle, reducing fatigue during repetitive use in professional or DIY engine assembly tasks.
• Compatible with a broad range of piston diameters, making it a versatile addition to any engine builder’s toolkit.

Construction & Design

The ARP 900-1650 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 construction guarantees precise dimensions and a smooth surface finish, which is critical for achieving a snug yet gentle fit around piston rings. The true-radius profile of each compressor is engineered to match the specific bore diameter, providing superior contact and reducing the risk of ring deformation or installation damage.

The reliefs for wire O-rings are carefully incorporated into the design, allowing for seamless installation in engines with specialized sealing needs. The Type 3 anodizing not only enhances the aesthetic appeal but also significantly extends the tool’s lifespan by protecting against wear and corrosion. The prominent engraving of bore sizes ensures quick identification, streamlining the assembly process and minimizing errors. Overall, the design emphasizes durability, precision, and ease of use, making it an essential tool for high-performance engine assembly.

Performance & Benefits

Using the ARP Ring Compressor (900-1650) during engine assembly offers numerous advantages:

• Ensures accurate and uniform compression of piston rings, promoting proper sealing and optimal engine performance.
• Reduces installation time and effort, thanks to its precise fit and ergonomic design.
• Protects piston rings from damage during installation, helping maintain their integrity and longevity.
• Supports high-performance applications by accommodating bore sizes around 4.1650 inches with precision.
• Contributes to a cleaner, more professional assembly process, reducing the likelihood of errors and rework.

Installation & Fitment

The ARP 900-1650 Ring Compressor is designed for straightforward, bolt-on installation. Simply slide the compressor over the piston and ring assembly, ensuring the true-radius profile matches the bore size. No additional tools, cutting, or modifications are required. Its lightweight construction and precise dimensions make it easy to handle and position, even in tight engine bays. This tool is compatible with a wide range of piston and bore sizes around 4.1650 inches, making it suitable for many high-performance engines and rebuild projects.

What's Included

• Complete ring compressor kit with CNC-machined billet aluminum components
• Multiple bore size inserts (if applicable) for precise fitment
• Installation instructions and user guide

Ideal For

• Professional engine builders and machinists
• Automotive enthusiasts performing engine rebuilds
• High-performance and race engine applications
• DIY mechanics seeking precision tools for engine assembly

Emissions Note

This product is a specialty tool and does not impact emissions or legal compliance. It is intended for use in engine assembly and rebuilds in accordance with local regulations.