Cheap Exhaust Packing
Stainless steel scourer washing up things, slightly picked apart, make really good sound dampening wadding for sticking in your homemade exhaust. I've made my tailpipe from about a foot and a half of 4" pipe with a detatchable end and just stuff the pipe with the things. They deaden sound greatly and have little or no noticable restriction.
Rex - UK
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