My blob sti type uk is still on a standard recirculating BOV But i also got an aftermarket one thrown in when i bought the car,the spring is much weaker in the aftermarket one than rhe standard and i am just wondering can i use the bung off the aftermarket one to blank off the pipe going back to the intake pipe and just have the standard one blowin off into atmosphere?i have no engine mods or the car hasn't been mapped to my knowledge!!