Traditional styling from 1950s-1960s. All silencers contain modern stainless steel wool lagging.. The Classic silencers come with optional fit mutes giving two possible levels of sound output. These systems are hand made, polished & plated in England, come with all fittings & can be used with Triumph centre stands. None of these exhausts are legal for use on British roads, & they may be illegal in other countries. Use is purchaser‚Äôs responsibility.