I have a tubocharged b-series motor on 3psi. of boost with an ebay blow-off valve but i got an HKS ssqv that i would like to replaced it with. First, would it be a direct swap over meaning all I that is needed is welding on the flange and using the same vacuum line as before( t-piece coming from the intake manifold also used for boost gauge) and no tuning? will it be worth it? is 3lbs enough boost to open the valve as i believe the new model hks is self-adjustable? when I fist got the hks valve(used) it was on a greddy piping from an rsx so i manage to rig it up to where i could go from ebay larger piping to greddy smaller piping using some couplers to see if i could check that it worked but it seem not to want to fully open and did not sound like a bov at all. When I went to switch back over to my ebay bov my motor kept revving up and down and i thought i had mess it up until after a couple of starts it was o.k. Could it be the change in piping diameter that cause it not to function correctly? I have been told that is what caused it to act the way it did but i do not want to pay to get it weld on and it not work on/mess up my car ek civic and have to go back to ebay bov. The hks bov is functioning correctly from what the mechanic said and i would just like to have a name brand bov over ebay. Any help will be greatly appreciated!!! Thanks for checking me out