Wiseco Black Anodized Tapered Ring Compressor Sleeve - 3.903in - 3.905in Bore - RCS39040

Hard-anodized and Teflon coated for low friction and prolonged wear resistanceSleeves have smooth radius that tapers down to the specific bore sizeCompresses the piston rings smoothly and evenlyGreatly reduces difficulty of installing high-performance oil ringsLaser-marked with size indication