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!