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The Fister II are online for $595 but then you need to turn in your stock exhaust. If I wanted to KEEP my stock exhaust it would cost double?
Yes, you either have to provide a set for modification or purchase one of their core sets if they have them available. I didn’t want to modify my factory motor sound mufflers so I was able to find a set of reasonably priced Gillets on fleabay (twice) and had them drop shipped.