ARP Ring Compressor

Universal Fitment

Part #: 901-9150

Overview

The ARP Ring Compressor (901-9150) is a specialized tool designed to assist in the installation of piston rings during engine rebuilds or assembly. Crafted for professional mechanics and automotive enthusiasts, this kit ensures precise, uniform compression for a variety of bore sizes. Made from high-quality materials, it provides durability and reliable performance, helping to streamline the engine assembly process and reduce the risk of ring damage or misalignment. This ring compressor kit is ideal for those seeking a high-precision, reusable tool that supports accurate piston installation, ultimately contributing to optimal engine performance and longevity. Its thoughtful design caters to both professional engine builders and serious DIYers who demand consistency and ease of use.

Key Features

Designed with CNC-machined 6061-T6 billet aluminum, the ARP tapered ring compressors feature a true radius for each bore diameter, ensuring a snug and accurate fit. The reliefs accommodate wire O-rings on the bottom, preventing damage during installation. Type 3 anodizing enhances corrosion resistance and longevity, making this tool suitable for repeated use in demanding workshop environments. The prominent engraving of bore sizes in 3/4 inch high numbers allows for quick identification, saving time during assembly. The tapered design provides a smooth, controlled compression, reducing the risk of ring deformation or damage.

Construction & Design

Constructed from CNC-machined 6061-T6 billet aluminum, the ARP ring compressor kit combines lightweight strength with durability. The true-radius design ensures precise fitment for each bore size, while the anodized finish offers corrosion resistance. Reliefs for wire O-rings are carefully integrated to prevent damage and ensure a secure fit during piston installation.

Installation & Fitment

This kit is intended to be a universal fitment, compatible with a range of piston bore sizes. Proper fitment should be verified against the specific bore diameter of your engine components. The tapered design allows for easy installation and removal, supporting efficient assembly workflows.

What’s Included

The package includes multiple tapered aluminum rings, each engraved with its bore size, and reliefs for wire O-rings. The set is designed for repeated use, providing a reliable tool for professional and hobbyist engine builders alike.