A sample from the products for the Muffler(s) include: Clamp,64.5mm, Collar,6.3x8.3x16, Pad, Body End-muffler,rr.
On this parts fiche the Nut,8mm is the most specified component.
The Muffler(s) is made up of components including this Manifold-comp-exhaust which is the most expensive.
