ARP Ring Compressor (901-9400)

The ARP Ring Compressor (901-9400) 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, these tapered ring compressors feature a true radius for each bore diameter, ensuring precise and uniform compression. The relieved design accommodates wire O-rings on the bottom, enhancing compatibility with various piston configurations. With Type 3 anodizing, the compressors offer excellent durability and corrosion resistance, while the prominent engraving of bore sizes in large, easy-to-read numbers simplifies identification during assembly. This high-quality tool provides a reliable, durable solution for professional engine builders and enthusiasts seeking accurate ring installation.

Designed for use with engine bores around 94.0 mm, the ARP tapered ring compressors are ideal for performance applications requiring precise piston ring seating. Compatible with a range of engine sizes and configurations, these compressors serve as a superior alternative to conventional tapered devices, offering improved fitment and reduced risk of ring damage. Suitable for both professional and DIY engine assembly, they are a direct-fit solution for rebuilding or assembling high-performance engines. The kit includes the necessary tapered ring compressor and features engraved bore sizes for quick identification, making them suitable for use in street, track, or off-road engine builds where accuracy and durability are essential.