i got the dd blowoff valve but it came wit the filter on it so its mad quiet, any kno whichpoart i need to buy. i want it to be loud so i went to overboost.com and they had an elbow piece and flange, please help

 

you can buy just the outlet part that replaced the filter. or simply remove the filter. IMO the older style blitz was louder and the "horn" will fit on the new style BOV = super loud

 

Fawk the filter and the horn, I don't use either because of space constraints.. Save your money

 

if you want a loud BOV get the TurboXS RFL. It's the loudest blow off valve I've ever heard. I can hear it a black and a half from my house.