ARP 901-9550 Billet Aluminum Piston Ring Compressor Tool

The ARP 901-9550 is a precision-engineered piston ring compressor designed for professional engine builders and serious enthusiasts. CNC-machined from 6061-T6 billet aluminum tube material, this tool features a true radius design that perfectly matches the bore diameter for smooth, damage-free piston installation.

Key Features:

• CNC-machined from 6061-T6 billet aluminum for exceptional durability
• True radius design provides superior performance over conventional tapered compressors
• Type 3 hard anodized finish for long-lasting corrosion resistance
• Relief cut at bottom accommodates wire O-rings
• Bore size prominently engraved in 3/4-inch high numbers for easy identification
• Precision fit eliminates risk of ring breakage during installation

This ring compressor represents a significant advancement over traditional tapered sleeve designs. The true radius bore matches the cylinder perfectly, allowing pistons to slide in smoothly without binding or ring damage. The relief cut at the bottom edge ensures the tool doesn't interfere with wire O-rings. Professional engine builders appreciate the quality construction and repeatable results this tool delivers on every build.