I just took my tip off and cut the spark arrestor and baffle off leaving about a 1.5" hole and it sounds great and runs better probably because my spark arrestor was so clogged up. I dont see how exhaust was getting through it with all the caked up black crap on it. Then i went to my local muffler shop and got some pipe welded to the tip for a snorkel. I will have pics uploaded soon.