Hi, i just picked up an 04 crf450r that has a new top end rebuild, runs pretty dang good. Believe it or not i traded it for an 04 ttr225 that has sat in our garage for 5 years. The honda started up second kick cold. This is my first race bike but ive ridden my buddies extra crf250r for the past couple years. The head pipe on the honda has a big dent so the guy included a brand new fmf powerbomb header but not the full system. Will the powerbomb fit with the stock silencer? Should i rejet after adding the powerbomb if it does in fact fit? Thanks in advance!