I don't know what those pipes are like, but i packed my thunderbike pipes almost all the way to the muffle/header joint without the slightest change in performance. And it quieted them down a good bit. Just right to my ears. Now if i ride w/o earplugs it doesn't sound like the shuttle taking off even during a slow start like it did before. The t-pipes are one long tube about 2" in diameter that runs the full length of the muffler. The last foot near the end has spacers between which the stock packing resides and there are of course many holes for the sound to soak thru. The rest of the tube only has a few holes that aren't round but are called louvers. Kinda like gill slits. And there are very few and only on many 1/3 to 1/2 of the length. However, those few holes help divert sound waves into the packing i put in, but theres also i believe a lot of sound attenuation just due to the space between the muffler and inner tube being packed and therefore quieting down the resonance of the metal. Overall the effect is quite good. i left maybe 1/3-1/4 of the length unpacked only because i didn't have enough packing to do the whole length. So it could get even quieter. Anyway, on mine it works well and if your pipes are similar it will work.
Last edited by iknowjohnny; 03/22/2006 4:48 PM.
