Ok...first off...i have heard about the bad headers "obx and pacesetter" now...what is a good header for my car?...also i love the sound my car has right now...but it seems like a header is really a good choice for performance...what would the sound difference be if i put the header on...make the downpipe.. and relocate the stock cat? or if i was gonna leave the stock cat on...would the header be worth it? thanx.