The Air Compressor Silencer Kit provides 6 dB in noise reduction, which is a clearly noticeable reduction in noise level. For every 3 dB, another 50% of the remaining sound pressure is eliminated. We are able to do this by reducing much of the higher frequency noise from the compressor. Simple to install and replaces the standard inlet and outlet components of the air compressor. Necessary components are shipped in complete kits with replacement parts offering.