Depending on what pipe you intend to use and on the particular bike, it might work fine with just the pipes.
If it doesn't you need the reflash, and since the reflash is calibrated for the air intake kit you should use it also.
These bikes do not like very low backpressure pipes.
If it doesn't you need the reflash, and since the reflash is calibrated for the air intake kit you should use it also.
These bikes do not like very low backpressure pipes.