Probably trying to let it breathe better ( exhale ) reduce back pressure . Theirs right ways and wrong ways to accomplish that . SYCARMS just touched on that in a very recent post , and layed out the proper procedure , search the threads , I mean like a week or so ago .
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2011 BMS KING COBRA 150 Sold
YERF DOG SPIDERBOX's Sold
YERF DOG 3203's. Sold
MANCO SILVER FOX. Sold
2009 POLARIS 500 HO SPORTSMAN 4X4
2002 POLARIS 500 HO SPORTSMAN 4X4
2000 POLARIS MAGNUM 2X4
HALF A DOZEN CHEVY 4X4's
NEED-MO-BUGGY