ARP Ring Compressor (901-8700)

The ARP Ring Compressor (901-8700) is a specialized kit designed to facilitate the installation of piston rings in high-performance engine builds. Crafted from CNC-machined 6061-T6 billet aluminum, this ring compressor features a true radius for each bore diameter, ensuring precise and uniform compression during installation. The tapered design enhances ease of use, while the reliefs accommodate wire O-rings on the bottom, preventing damage and ensuring proper sealing. Type 3 anodizing provides a durable, long-lasting finish, and the prominent engraving of bore sizes in high-visibility numbers allows for quick identification and selection. This tool offers superior accuracy and durability compared to conventional tapered compressors, making it an essential component for professional and enthusiast engine builders.

Designed to fit pistons with an 87.0 mm bore size, this ARP ring compressor is ideal for use in high-performance, racing, or rebuild applications where precision is critical. It is compatible with various engine configurations requiring accurate ring installation, particularly in applications demanding reliable sealing and performance. The kit is suitable for use in both street and track engines, providing a secure, bolt-on fit that simplifies the assembly process. The true-radius design ensures minimal ring distortion, promoting optimal engine performance and longevity. This compressor is a direct replacement or upgrade for standard tools, offering enhanced durability and ease of use for professional machinists and experienced DIY enthusiasts alike.