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I have a hks replica exhaust with the magnaflow x-pipe mod and I had a buddy run straight piping for a rear muffler delete. Now the configuration is similar to a TDX with just the x pipe muffler and straights after. I also have resonated test pipes, a popcharger, and the AAM angled plenum spacer. I figured I upload a video to show you guys what this setup sounds like. I was impressed. It sounds pretty good to me and of course it sounds better in person.
I don't have pictures of the underside, but it's pretty straightforward. It's just like all the other hks replicas with the magnaflow x pipe muffler welded into the system in place of the two front side-by-side resonators. I just removed the two rear axle sections with the mufflers and side branch resonators and ran straight 2.5 piping.
sounds decent, there is a little "whoosh" sound after the rev that had me tilting my head like a dog when they don't know what you are saying
It seems it's just the nature of the beast with VQs paired with test pipes/hfcs. Seems like the only ones to really help with the hiss are the MD ARTs. It's been discussed here before. https://my350z.com/forum/vq35hr/3444...c-hissing.html