Budget Y pipe: JIC Magic or OBX

PR370z

Instaled my JIC magic y pipe today, the quality of this pipe looks really good. The sound is definitely louder/ deeper mched almost perfect to my ERZ HFC's (around a 2.3'" inside diameter). But on the back end the y pipe has around a 2.8" ID and the stock exhaust is around 2.3". Should I leave it like that? Should itry to make the stock exhaust a little bigger (grinding or sanding)? I there any noticeable hp loss from this?

Thanks for the help

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MODS:293 Whp/ 246 Tq K&N drop ins, ERZ HFC, JIC-Magic Y Pipe, HPS post MAF tubes, Nismo shift knob, 30% tints, JDM rear fog light more to come!

Vince's Red-Z

Hey dude, On you y-pipe you mentioned it had a larger diameter at the end and the stock has less, what did you end up doing? Did you notice a gain/loss of performance? I am looking to get the OBX y-pipe. Thanks

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Vince's Red-Z

Well, Saturday (1/30) I installed my OBX Y pipe. OBX has a real good product, good welds, good grade tubes; nice. There was a good noticeable increase of hp and torque however, it seemed to make my Z quieter I also didn't care for the 3" exit into the 2.8 on the stock pipe leading to the OEM muffler. The gains make up for the sound but, I had a feeling I should have just waited till I could have bought a full cat back (gains+sound). For now it is ok, I guess its back to the "drawing board". I have my eye on the Invada Genesis; one day, one day... (any donations?)

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