I've got a friend who cut out the spark arrestor. He did it with a dremel tool. I hope I spelled dremel right...hehe. Anyway, all he did was take the end-cap off and use a dremel to cut the spark arrestor off of the end-cap. It's sounds really cool...but I don't think it improves the performance at all. In case you don't know what a dremel is... http://www.sears.com/sr/mercado/searchall.jsp
go there...it's the first picture. They have a dremel kit for $70. Also, dremels come in handy for tons of other uses too.
go there...it's the first picture. They have a dremel kit for $70. Also, dremels come in handy for tons of other uses too.