i bought an apexi exhaust very similar to the wsII. my question is.would i be able to buy the flexible tubing that they sell at kragen/autozone/pepboys used for exhaust piping of course.the tubing itself is 3" and it was cut off at the end where it connects to to actual piping under the car. before it bolts onto the other piece. would i be able to use the flexible piping without losing power? or would it be better to get it welded onto my old peice? i still have the stock exhaust that i can do mods to