I don't know about steel wool, but why not use muffler packing? i did this and it reduced the volume a good bit. I used "silent sport" which i heard is the best because it lasts far longer. Anyway, my thunderbike pipes are the same from your description. A baffle about a foot long at the end and the inner pipe is the length of the muffler. there are some slits called "louvers" along about 1/3 to 1/2 of it, so i'm sure those help. but even if yours doesn't have those i think it will still help because it at least deadens the acoustic properties of a hollow tube inside a hollow muffler. so i packed the space between the tube and muffler by tying it onto the inner tube with masking tape which only is needed to hold it there till it's inserted. I'm told it eventually burns off but it doesn't matter if it does or not. Anyway, i packed about 2/3 of the length because thats all the packing i had, and it made a considerable difference. I can now ride w/o earplugs (not that i usually do tho) and it doesn't sound so freaking loud. If you can drill holes about every inch around the tube it would help quiet it more im sure. the guy at silent sport told me to do that. But since it already had maybe 30 louvers i passed because the metal was too hard to drill.
Anyway, it will work to some degree. I can't say for sure how much w/o any hole since mine has those louvers, but it's worth a try and i'm sure it'll at the very least mellow them out just due to the acoustic resonation of the pipes being dampened. I haven't gotten around to it, but one of these days i want to pack the remaining third. I didn't buy the pipes for volume......i wanted the power and the tone with just a little more volume. But nothing like the stock thunderbike pipes. i don't understand everyone's desire to be loud. when a bike is loud, to me it makes it feel slower because it seems to sound like it's working a lot harder than it's going if that makes any sense.
Last edited by dazco; 05/12/2006 12:37 AM.
