Arrow 71814AK Thunder Aluminium Slip-On Muffler w/Carbon End Cap for Benelli BN 600i/BN 600R 13-16Thunder Carbon end cap Exhaust for Original Headers Approved following European Directive 97 24 EC, ch. 9 Silencer Outersleeve Material Aluminium Silencer Inner Materials Stainless Steel Rear End cap Material Carbon Silencer Mounting Screwed mount Body Length 300 mm Junction (inlet) Diameter 40 mm Junction (outlet) Diameter 45 mm dbKiller Yes More and more new bikes are designed with very small silencers. moreover, these small silencers are also