save your money ... well if you have some left over after your atv purchase than get a nice aftermarket pipe... im short on money ..but own a welder i went to my local pawn shop and went thru the big junk pile of drill bits until i found a 3/4" drill i took it home and welded an extension to it... with an overall of about 15" and drilled out my stock muffler on my mojave ... did it work you ask. oh boy it pulls nicely....and since i live at about 2000 feet i didnt change the jet at all in the carb.... im very pleased with the out come and yes it even sounds good.... not to loud at all but wow what a difference Take care...... Jim.......