Have a gtx3576r ll im about to put on with a sheepy exhaust manifold. Already have the ETS v3 and test pipe. Wondering which downpipe to get. Obviously I'm looking at the ETS open dump over the recirculated but how much louder will it be when vs the gains? Basically trying to talk myself into the open dump lol. Also have the walboro 450 which I cut and soldered with the harness, is that considered hard wiring or is it something else needed to be done for that?? Need a fuel rail or something to check my pressure to make sure I'm good but can't decide. Sorry I'm all over the place, should of titled it "what else do I need before tune".