The Wiseco 78.50mm bore black anodized ring compressor sleeve is an engine-building tool that squeezes the piston rings into their grooves so the piston can be pushed into a cylinder bore of that size.

Wiseco ring compressor sleeves are forged in-house in the USA and are a precision solution to assist in your high-performance engine build.

Features

• Hard-anodized and Teflon coated for low friction and prolonged wear resistance
• Sleeves have smooth radius that tapers down to the specific bore size
• Greatly reduces difficulty of installing high-performance oil rings
• Compresses the piston rings smoothly and evenly
• Laser-marked with size indication