Vance & Hines Mini Grenades Full Exhaust For Harley The stepped and staggered design of the exhaust system likely refers to the arrangement of the exhaust pipes. This design often helps in optimizing exhaust gas flow, which can lead to improved performance and sound characteristics. Its lean and mean stance gives the bike a more muscular stance and it's rowdy growl suggests performance. Features: Aggressive Deep Tone Signature Three-Step Design CNC Machined Billet End Cap Matte black finish