Nismo S-Tune Exhaust (15-5850) vs. Nismo H-Pipe Config Exhaust

scruffydog

I don't know if anyone has asked this before, but I'd like someone to verify that there are currently 2 different Nismo Exhaust Pipes sold.

Nismo Exhaust System # 1 P/N 15-5850?
The first Nismo Exhaust System is sold on Nissan's Website, aka "Cat-Back Exhaust System", some call it "NISMO S-Tune Exhaust System", and some call it the "X-Pipe Configuration"? This exhaust system claims to have 5.3hp increase.



Nismo Exhaust System #2 P/N TBD?
The second Nismo Exhaust System is sold with the Nismo 370Z. It is known to be called the "H-Pipe Configuration Exhaust System". Currently, it is not sold anywhere by itself unless you own a Nismo Z? Does anyone have any stats to know if this exhaust setup is currently the best compared to other aftermarkets exhaust. It's rated to have an increase of 18hp, of course it's a combination of both tuning, and the exhaust. But anyone know how much increase would it be if it were to be put on a regular 332hp 370Z? How much Horsepower is it really that came from the tuning/exhaust alone? Plus, does anyone know if you can order this exhaust in the near future alone? Any idea what the P/N would be? Or do you really have to own a Nismo to get one?



Please correct me or verify with me any information I've posted. Thanks!

280z/300zx

Good questions. The only thing I can add is that the Nismo exhaust from the Nismo Z probably would not fit the standard 370z for two reasons. One, the rear bumper is slightly longer than that of the regular 370z which means so is the exhuast. Two, the tips on the Nismo Z are huge and probably would not fit with the standard Z's exhuast tip cutouts. That being said I wonder if you could combine the muffler portion of the regular nismo exhuast currently being sold with the H-pipe of the Nismo Z exhuast.

Still, as much as I would like to use factory parts 5.3 hp vs. the aftermarkets 15+hp doesn't even compare. At this point I'll be going with Stillen or FI. for exhuast.

scruffydog

Thank you for such great info. I have been deciding on buying the Nismo Rear bumper/spoiler for the 370Z separately (Due to wanting to upgrade a fully loaded 370z instead of buying a stripe down performance car, I wanted to have everything, both luxuary and performance). Now that you have confirmed the fitting of the Nismo H-Pipe Config to not work with the Stock Z, I may have to purchase the Rear Bumper and Exhaust together. I was thinking about the Stillen too, but then it'd be nice to have everything factory parts and matching.

BerkTech

Just a FYI, that Nismo exhaust isn't an H-pipe, it's actually an X-pipe, more specifically a tangential siamesed X pipe.

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Greg

Good description

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Shunya

Lug

Any idea why they went with this setup? It's gotta be much harder to fabricate than full duals. Curious minds want to know.....

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scruffydog

I didn't name the exhaust pipe an H-Pipe by myself, I got it from my research. I totally can see that it's not a true H-Pipe at all, but why are people keep calling it a H-Pipe Configuration? Nissan itself called it that, Motor Trend, and many others....so anyways....What should I call it?

So i'm guessing no one here's for the Nismo H-Pipe Configuration? (I'm gonna call it that because that's the only name I know it for that separates from the other standard 370Z Nismo X-Pipe).

If I wanna get the Nismo body kit - Rear Bumper mainly, is there no way to fit other aftermarket exhaust (e.g. Stillen, etc) since they're different in dimensions and locations; mainly the Nismo Rear Bumper requires a longer pipe?

Or are any of these questions too early for answers since nobody here seems to really own a Nismo 370z or know of any aftermarket companies that's going to be making any parts for the Nismo 370z. (Remember, I'm just taking "280z/300zx"'s word for the Nismo H-Pipe Config exhaust being longer since the bumper sticks out more, but can anyone verify this?)