ARP 901-8300 Billet Aluminum Piston Ring Compressor

The ARP 901-8300 is a professional-grade piston ring compressor precision-machined from 6061-T6 billet aluminum tube material. Unlike conventional tapered ring compressors, this tool features a true radius design that matches the exact bore diameter, ensuring smooth piston installation without risk of ring damage or breakage.

Key Features:

• CNC-machined from 6061-T6 billet aluminum for superior strength and precision
• True radius bore design eliminates the need for twisting or forcing pistons into place
• Relieved bottom edge accommodates wire O-rings without interference
• Type 3 hard anodized finish for exceptional durability and corrosion resistance
• Bore size engraved in large 3/4-inch numbers for quick identification
• Available in SAE sizes from 3.552" to 4.750" and metric sizes from 75mm to 95.5mm

Widely acclaimed by professional engine builders, ARP's true radius ring compressor design provides consistent, reliable results and significantly reduces the risk of piston ring damage during installation. The precision machining and hard anodized finish ensure this tool will provide years of service in demanding shop environments.