New tapered piston ring compressor in custom sizes for your Datsun "L" series engine build. This tool can be used with any piston from any manufacturer to easily compress the piston rings smoothly and evenly.
• Hard anodized and Teflon coated for low friction and prolonged wear resistance.
• Sleeves have a smooth radius that tapers down to the specific bore size.
• Compresses the piston rings smoothly and evenly.
• Greatly reduces the difficulty with installing thin high-performance oil rings.
Order the tool size that matches your engine bore size.