best exhaust system

[motochain55]

I just got a 2003 400ex and I can't decide on wich exhaust to get? I hear that White Brothers are good, but I want to know for sure. And also, is the stock head better for an engine that is not modified. I want to know about the jetting too?

yes the stock header is better...except the powerbomb...its good for stock engine also...if u plan on getting other mods i would purchase a sparks x-6 if you dont...i would buy a slip on...such as hmf or white brothers...the jetting on a slip on really shouldnt change...but for a full exhaust u will be going up...i would say a full exhaust such as the x-6 with a k&n or foam filter...u would be around a 155 main and a 42-45 piolet

[Out_Sider]

i think you would like the DMC Alien, that may be expensive for you...so i would just get a slip on

[pnut420]

Sparks X-6, HMF full exhaust, LRD, Hetrick are all good pipes. If you want a slipon I would go HMF, they got pretty good deals and are made good...