ARP Ring Compressor (901-8950)

The ARP Ring Compressor (901-8950) is a specialty kit designed to facilitate the installation of piston rings in engine cylinders. Crafted from CNC-machined 6061-T6 billet aluminum, this ring compressor features a true radius for each bore diameter, ensuring precise and secure fitment. The tapered design improves installation ease while maintaining optimal compression. Reliefs for wire O-rings on the bottom enhance compatibility with various piston configurations. Type 3 anodizing provides a durable, long-lasting finish, and prominent engraving of bore sizes in high-visibility numbers allows for quick identification during assembly. This high-quality tool offers superior performance and reliability compared to conventional tapered compressors, making it an essential component for engine builders and technicians.

Designed for use with bore sizes around 89.5 mm, this ring compressor is ideal for engine rebuilds and assembly processes requiring precise ring installation. It is compatible with a range of piston sizes and is suitable for performance and racing applications where accuracy and durability are critical. The kit is a direct replacement or upgrade for standard compressors, providing a secure fit and reducing installation time. Its lightweight aluminum construction ensures ease of handling, while the true-radius design minimizes ring deformation and damage. Suitable for professional workshops and serious enthusiasts, this compressor enhances engine assembly efficiency and ensures optimal sealing performance.