hi, iv got very vague instructions on how to de restrict my air box. i have been told to take two pipes out the air box system to help the flow of air. HOWEVER, the pipe i have been told to remove in the lid of the airbox, does not seem to want to come out the way the instructions say. They say i have to push the two pins of the pipe together and simply push it out. but mine is just plastic and does not seem to want to do this. can any1 shed any light please?