ARP 899-5720 Billet Aluminum Piston Ring Compressor

The ARP 899-5720 is a precision-engineered piston ring compressor designed for professional engine builders and serious enthusiasts. CNC machined from 6061-T6 billet aluminum tube stock, this tool features a true radius bore that matches the cylinder diameter exactly, ensuring smooth piston installation without ring damage.

Key Features:

• CNC machined from 6061-T6 billet aluminum for strength and durability
• True radius bore design eliminates the risk of ring breakage during installation
• Relief cut at bottom accommodates wire O-rings on pistons
• Type 3 hard anodized finish for long service life and corrosion resistance
• Bore size prominently engraved in large 3/4-inch numbers for quick identification
• Far superior to traditional tapered ring compressors

This professional-grade ring compressor is widely acclaimed by engine builders for its precision fit and ease of use. The true radius design provides uniform compression around the entire ring pack, allowing pistons to slide into the bore smoothly while protecting expensive piston rings from damage. The hard anodized finish ensures this tool will last through countless engine builds.