ARP Ring Compressor (901-8900)

The ARP Ring Compressor (901-8900) 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 improves ease of use and reduces the risk of ring damage. Reliefs for wire O-rings on the bottom enhance compatibility with various piston configurations, while Type 3 anodizing provides durability and corrosion resistance. Prominently engraved bore sizes in high-visibility numbers allow for quick identification, streamlining assembly processes. This tool offers a combination of precision engineering and robust construction, making it an essential accessory for professional and enthusiast engine builders seeking reliable, long-lasting performance.

Designed for use with engine pistons requiring bore sizes around 89.0 mm, the ARP tapered ring compressor is suitable for a range of high-performance applications. Its precise fit and durable construction make it ideal for both street and race engines, ensuring smooth, damage-free ring installation. Compatible with various engine types and bore diameters, this kit serves as a direct replacement for conventional compressors, providing a secure fit and easy installation. The kit includes the aluminum ring compressor and engraved bore size indicators, with no additional components required. Whether for rebuilding or assembly, this tool enhances efficiency and accuracy, supporting optimal engine performance and longevity.