im lookin for a atmospheric blow off valve , ino our engines dnt like them but i love the sound of the woooshh! lol. my mate fitted a atmospheric on his seat leon cupra and he hasnt had no error codes. i was wondering tho a dump valve i have seen on ebay is 34mm diameter will this be a straight fit or not? if not what will i need. i was lookin at them turbosmart dual port bov's they look good a bit pricey tho?