ARP 901-7900 Piston Ring Compressor Tapered Billet Aluminum Tool

The ARP 901-7900 is a professional-grade piston ring compressor engineered for precision engine assembly. CNC machined from 6061-T6 billet aluminum tube material, this ring compressor features a true radius design specifically tailored to the bore diameter, ensuring proper compression without distorting piston rings during installation.

Key Features:

• CNC machined from 6061-T6 billet aluminum for exceptional strength and durability
• True radius design matches bore diameter for uniform compression
• Bottom relief for wire O-rings prevents interference during installation
• Type 3 hard anodized finish for long-lasting corrosion resistance
• Bore size prominently engraved in 3/4-inch high numbers for easy identification
• Superior to conventional tapered ring compressors

The true radius design provides significant advantages over traditional tapered compressors by maintaining even pressure around the entire ring circumference, reducing the risk of ring breakage or improper seating. This tool is widely trusted by professional engine builders for its reliability and precision. ARP ring compressors are available in standard SAE sizes from 3.552 to 4.750 inches and metric sizes from 75mm to 95.5mm, making them suitable for a broad range of automotive, motorcycle, and performance engine applications.