welcome! i suggest u get the filter first, always the best since the stock filter is crap. since you said u trail, get some fmf fattys, good all around pipe, especially for trails. they have a nice kit on alba for about $480, with the acception of a air filter adapter that u will need for $ 45, making is $525. http://alba.buyol.com/Item/banpk.htm and http://alba.buyol.com/Item/PD201RC.htm . the powercore2 is a real good silencer, the cheapest and most badass sounding one for the fattys.