loudest 4poke pipe?

hey guys whats the loudest 4t pipe? i was thinking fmf or hmf ... i know yosh has the most power but just wondering ...btw this is for a friend

adjustable to meet racing DB and can change it
Pipe SuperTrapp: Performance ExhaustI:Ihttp://www.supertrapp.com/product_sections/cat.asp?CatID=52
Twenty-two - 4” race discs and an open end cap are included.
Add 4” race discs to increase horsepower, exhaust tone and flow – it’s that easy!
Remove 3” discs to reduce sound and increase lowwww.supertrapp.com

 
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hmf or saprks o for sure. my buds got and hmf on his yfz and is louder than sh*t. and my friends warrior i posted a vid on with the hmf is louder than sh*t too. ahhhh i can only dream of when i sell my blaster and get a yfz or a 400ex with a hmf. wait wat i mean get a banshee with some cpi's
 
i have a buddy who never cleaned his airfilter, changed his oil etc. he had a dg pipe on his bear tracker 250. he didn't rejet the carb. it was loud when he first got it. 5 years later now and still no maitenance to his bike no repacking its got to qualify for the worlds loudest atv. this thing is freaking ear piercing loud. it pops on decelleration sooo bad. i dont know how this atv runs. i mean no knocking, ticking etc. but that pipe is LOUD!!!!!!!!!!!