Piston Ring Compressor Band – 4-3/4" to 5"

Make piston and cylinder installation easier with the Piston Ring Compressor Band, designed for engines using pistons within the 4-3/4" to 5" diameter range.

The compressor band applies even pressure around the piston rings, holding them securely within the piston grooves while the cylinder is installed. This helps prevent rings from catching on the cylinder, reducing the risk of chipped, bent, or broken piston rings during cylinder installation.

Designed for use with compatible Ring-O-Matic-style piston ring compressor pliers, the specialty tool for cylinder replacement, top overhauls, and complete engine rebuilds.

Product Features

• Size Range: 4-3/4" – 5"
• Quick-change piston ring compressor band
• Provides even compression around piston rings
• Helps prevent piston ring damage during cylinder installation
• Reusable professional engine service tool
• Ideal for cylinder changes and top overhauls
• Designed for large aircraft-style engine pistons
• Compressor band only – compressor pliers/handle sold separately

Engine Compatibility

The engines with piston dimensions within its 4.75"–5.00" working range.

Common applications include:

Continental 470 / E-Series – 5.00" Bore

• O-470 Series
• IO-470 Series
• E-165 Series
• E-185 Series
• E-225 Series

These Continental engine families utilize a 5.00" cylinder bore in standard configurations, placing them within the compressor band's working range.

Lycoming

• O-290 Series – select configurations with approximately 4.875" bore