ARP Ring Compressor (901-7900)

The ARP Ring Compressor (901-7900) 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 kit features a true radius for each bore diameter, ensuring precise and uniform compression during installation. The tapered design, relieved to accommodate wire O-rings on the bottom, enhances compatibility with various piston configurations. Type 3 anodizing provides a durable, long-lasting finish, while prominently engraved bore sizes in high-visibility numbers allow for quick identification. This precision-engineered compressor offers superior performance over conventional tapered devices, reducing installation errors and protecting piston rings from damage.

Designed for use with engines requiring bore sizes around 79.0 mm, this specialty kit is ideal for professional engine builders and enthusiasts working on high-performance or custom applications. It is suitable for a range of engine types and can be used during assembly or rebuild processes to ensure proper ring seating. The kit includes the necessary tapered ring compressors, each tailored to specific bore sizes, and is intended for direct use in engine assembly. Its compatibility with various piston and ring configurations makes it a versatile tool for street, race, or off-road engine builds, providing reliable and consistent results during piston installation.