now that i use one of those small batteries which is tucked into the tailof my 06 mono i was able to remove all supports for the battery box.this opens a lot of room . when i go for my engine work .i will rework the exhayst to shorten the distance from head to the end of silencer .the way i plan the new pipes i can shorten this distance by2 feet for each. this will free up breathing i figure by #$%^&* now i am not a genius but it must have the same results as increasing the diameter of the pipes