Hi when you have got two blow off valves like i have (R33GTS-T) a stock one and an aftermarket one is it at all posible to remove the stock bov,cover it over accordingly,plug up the recirculation holes in the intake pipe and have no problems with the cars performance whatsoever?or would it be better to just replace the pipe going over the motor all together???...........It is also my knowledge that if the bov doesnt retain the recirculation that it is fineable by the epa and the police all because of the oil mist that runs through the intake pipes being thrown out into the atmosphere with an externally venting bov.Much like the oil catch can enclosed (ok) externally vented (not ok)