oops,i forgot about the zenoah bolts.been a long time since i looked at mine.I just went to ace and picked up 2 nuts and bolts.easier than paying .99 cents a bolt,plus .99cents a nut plus 4.99 up to 7.99 s&h.just came from horizons website.plus you have to wait for the package and somtimes they have to backorder.But majortom did describe the proper method in wich the mufflers are to be mounted.