ARP Ring Compressor (901-8500)

The ARP Ring Compressor (901-8500) is a specialized tool designed to facilitate the installation of piston rings in high-performance engine builds. Crafted from CNC-machined 6061-T6 billet aluminum, this compressor features a true radius for each bore diameter, ensuring precise and uniform ring expansion during installation. Its relieved design accommodates wire O-rings on the bottom, enhancing compatibility with various piston configurations. The Type 3 anodizing provides a durable, long-lasting finish, while the prominently engraved bore size markings allow for quick identification. This high-quality tool offers superior control and accuracy compared to conventional tapered compressors, making it an essential component for engine builders seeking reliability and precision.

Designed for use with bore sizes around 85.0 mm, the ARP tapered ring compressor is ideal for high-performance and racing applications requiring precise piston ring installation. Suitable for engines with bore diameters close to 85 mm, it is compatible with a range of piston and ring configurations. The tool is a direct-fit, bolt-on accessory that simplifies the installation process, reducing the risk of ring damage or misalignment. Whether used in professional engine shops or by serious enthusiasts, this compressor ensures a smooth, efficient installation process. It is especially beneficial for rebuilding or assembling engines where accuracy and durability are critical for optimal performance.