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The Wiseco ring compressor sleeve for a 4.005 in bore is a precision engine-assembly tool forged in-house in the USA. Hard-anodized and Teflon-coated for low friction and extended wear, the sleeve’s smooth radius tapers to the bore size to compress oil rings evenly and reduce installation difficulty on high-performance pistons. Each sleeve is laser-marked with its size for clear identification during use.
Wiseco 4.005in Bore Ring Compressor Sleeve
