the boost bottle costs you bottom end. TAKE IT THE HELL OFF!!! and and no 2 into 1 doesnt give you more bottom end. the pipe looses power, and the carbs flow better up top, and they tend to burn up a motor if its isnt PERFECT and my brosthers has bottom end close to 4 pokes, it has FMF fattys, stock carbs, open air box, VF2's and +4 timng stock front sprocket and like a 42 on the rear, it whill up and jump off the line and with the gearing it gets up fast too, just not a quick as a more top end bike. oh and no porting done to it.