Hi, I just purchased my first performance bike, have an old blaster but we wont go there. I am new to the mods of these, this has a Boss coolhead and series 4 intake with a single Keihn and K&N. We do hillcross and hill drags on snowmobiles, and in that world, more airflow and fuel = more power. I tried researching the 2 in 1 kits versus the 2 carb set ups, and the singles seem to be in much more demand. Is there a reason for this? like better response or? Also, the cans on the pipes say FmF, but the pipes are black and seem to be unmarked. Is there a way to tell who made them or possibly stock pipes? They are twins and black, not sure if they came stock with twin pipes or what. Previous owner bought it from the person who did the mods and it sat for 2 years never ridden and he doesnt have a clue to what anything is on it anymore. Any help would be greatly appreciated.