Silencer wadding made from fibreglass for all Polini end cans and also for rear exhaust of other manufacturers. Over time the original wool will become rotten and the noise is worsened. . The only option is to swap out the sound deadening in the end can. Conveniently, the Polini wool is pre-cut as a mat and thus allows for relatively easy replacement. Dimensions: approx. 60x30x3cm