For christmas this year i am probably gonna get an exhaust system. I have heard good things about the dmc system and the white brothers but alot of people tell me dont get the head pipe because it adds too much noise for the little preformance it does and i ride in illegal high tension wires. I was wondering if the head pipe a real noticable amount of preformance. My friend says the supertrapp ids2 exhaust system is not that lound witht the headpipe and gives out preformance.

 

Although an after market header for the 300ex will certainly flow considerably more exhaust than the small OEM header, I wouldn't think that, in and of itself, it will create more decibles,but combined with a more efficient exhaust pipe/muffler and possible air box lid modifications, your ride will definitely be heard[img]i/expressions/face-icon-small-wink.gif[/img].
If it was my bike I'd get the full system and just go with the stock number of discs in the Supertrapp to keep down the decibles to a reasonable level.
On many other quads, such as the Warrior for example, the header is large enough for a stock engine and a slip-on pipe is fine, but the 300ex's header does limit exhaust air flow and a bigger header will make a noticable difference; and don't forget that you'll need to re-jet your carb to accomodate the increased airflow.[img]i/expressions/face-icon-small-cool.gif[/img]