ARP ARP

Universal Fitment

Part #: 901-8800

Overview

The ARP Ring Compressor (901-8800) is a specialized tool designed for professional engine builders and automotive enthusiasts who require precise and reliable cylinder bore sizing during engine assembly. Crafted from high-quality CNC-machined 6061-T6 billet aluminum, this tapered piston ring compressor ensures a perfect fit for a variety of bore diameters, facilitating smooth piston installation and reducing the risk of damage. Its true-radius design provides superior bore conformity compared to conventional tapered compressors, supporting optimal ring sealing and engine performance. The reliefs for wire O-rings on the bottom further enhance compatibility with modern engine designs, making this tool an essential addition to any engine rebuild or assembly process. Whether you're a professional engine builder or a dedicated DIYer, this compressor helps streamline your workflow and ensures consistent, high-quality results.

Key Features

This ring compressor combines precision engineering with durable materials to deliver reliable performance and ease of use. Key features include:

• Manufactured from CNC-machined 6061-T6 billet aluminum for strength and durability
• True-radius design for superior bore conformity and sealing
• Relieved to accommodate wire O-rings on the bottom for modern engine compatibility
• Type 3 anodizing for long-lasting corrosion resistance and surface protection
• Prominently engraved bore sizes for quick identification and selection
• Designed to facilitate piston installation in a variety of engine rebuilds
• Lightweight yet robust construction for ease of handling during assembly

Construction & Design

The ARP Ring Compressor is crafted from high-grade 6061-T6 billet aluminum, CNC-machined to precise specifications. Its true-radius design ensures an even, consistent compression of piston rings, reducing installation effort and minimizing the risk of ring damage. The Type 3 anodized finish enhances corrosion resistance, ensuring longevity even in demanding workshop environments. The engraved bore sizes provide clear, easy identification, streamlining the selection process during engine assembly.

Installation & Fitment

This tool is designed for use with a wide range of engine bore sizes, with bore diameters clearly engraved for quick reference. Proper fitment involves selecting the correct bore size and carefully aligning the compressor during piston installation. Its lightweight, durable construction allows for easy handling and precise placement, supporting efficient engine assembly workflows.

What’s Included

The package includes the ARP Ring Compressor (901-8800) with multiple bore sizes engraved for versatile application, along with detailed instructions for optimal use during engine rebuilds.