Try to avoid the trap of just looking at peak HP & TQ numbers and concluding that "Brand X" makes more than "Brand Y". Look at the gains in each across the entire powerband, concentrating on the areas where you really do your driving.

In the majority of the tests I've seen, the Nismo exhaust has slightly more modest peak gains, but by far the most consistent return over the entire powerband. Many of the "high peak HP" systems do this through low back pressure and thus sacrifice low end torque.

Remember the old saying, "horsepower sells cars, torque wins races".

 

Wedge,

Actually the first time I looked underneath the 350Z, I think Nissan had considered a true dual exhaust. Nissan has always tried to streamline things and usually make designs in advance in case they every want to do something, rather then change something. For example the G35 or 240-280Z's a lot of stuff is interchangable.



If you look in this picture number 5 and 6 there are two heatshields on the under carriage this may be if they want to reverse the exhaust or dual? Underneath your car there is a stud that sticks out off the frame and appears to be a place to mount another exhaust piece. You are right the sway poses a problem but i'm sure they could easily change that.

So I think Nissan left some room open if they ever decided to go with a dual or turbo(which I highly doubt anytime soon). Anyways I just thought I would throw that out there for fun..

Reen also made some great points too.

 

StrictlyZ......you may be right. The only real problem most people have is the sway bar with regard to the rattle issue. I had to readjust mine following the RT Cat installation due the the cats coming down a bit lower than the stock ones.

I remember reading an article concerning the original design of the 350. It said one of the final prototypes was being inspected by the head of Nissan. The design only had one exhaust tip. He looked at the engineer and said "Sports cars have two exhausts tips. According to the article, because of that statement, the twin exhaust tips were designed into the 350. They also posed the question, "What if he had said, "Sports cars have dual exhausts.",? I suppose if he had said that, the sway bar would have a dip on both sides.

Hmmmm.......wonder if the aftermarket sways considered doing that?

moto is right about the fact that there can be too little back pressure. One mechanic explained it by saying to take a garden hose with no nozzle on it and turn on the water. Now try to squirt the water across the yard. It doesn't go very far. Now offer some resistance to the pressure by putting your thumb over half the opening in the end of the hose. The water shoots out with force. In other words, the resistance to water flow created by your thumb created more force even though the water pressure coming to the hose was the same. Don't exactly know the whole scientific theory behind that one, but I am sure there is one somewhere.

 

Here my opinion.( have listen to all exhaust that I am commenting on.)

I currently have Stillen Exhaust. They have deep non-throaty sound.

As for Nismo, They sound just like stock but little louder.

Borla sounds deep but not as deep as Stillen and its actually pretty quiet.

They are sound great with little different characteristics.


I really like my Stillen Exhaust and Love the sound but
had I known that Performance Nissan was selling Nismo catback exhaust for less than $900, I would have bought Nismo and saved my self over $250. Like I said before, I like my Stillen Exhaust but If I had to do it again, I might bought Nismo just because of the price.

Stillen $1150
Nismo $899 at Performance

 

Neat analogy, but not really valid. When you stick your thumb over the end of the garden hose, you're making a crude venturi. You're gaining velocity at the expense of flow rate. Pressure inside the hose goes up (back pressure) because it can't escape as fast. You'll get rid of more water faster without the thumb, it just won't be as impressive.

 

Personally I like the Injen design because it gets rid of that F$&%ing stupid crossover muffler thing. As far as I can tell Injen is the only exhaust doing that.

One of these days I'm going to get a custom trailer hitch put on to haul race gear around(ala Miata, S2000, Corvette, etc). NOT having that crossover there will really help that.

Has anyone else thought of this?

 

Well Said!

 

Interesting fact: Mad Mike Taylor made this recommendation. And I think it was about the single center exhaust tip.

 

Fujitsubo = NISMO

 

What is the weight on the NISMO? How much does stock weight?

 

nismo is supposed to be 9lbs lighter than stock, stock weighs in at 62 lbs

thanks for that analogy ssk0771...comparing nismo and stillen, with the money i save going nismo i could put that towards cats or headers

that being said, i would go all nismo for e/h and then go with kinetix cats

does anyone know if this would then require an ECU reflash for A/F?

 

Anyone know the actual correct weight of the Stillen?

 

I believe its 72 Lbs as its 10 Lbs heavier then stock..

 

aside of $$...
i think amuse exhaust system w/o cat is the best..
anyone?\

 

on US models there are fitiment and CEL issues, other than that...if only i had the money to find out !

 

I have that comparison here and the Borla made.1 hp peak more than the next highest (stillen), .6 hp peak more than the Injen, 1.9 hp peak more than the Nismo. Look at the rest of the Rev range as well as the peak torque and you will see that the Borla clearly does not produce the most effective performance increase. The Nismo had 1.8 lb ft of torque more at the torque peak than the Borla. Looking at the graphs (area between base and tested system curves), it appears in this order the Stillen, Injen, Nismo, then Borla for overall performance gains.

Cheers!

 

Looking at the dyno graphs in the SportZ magazine article, Stillen has the most area under the dyno curve followed by Injen. But I wonder if the extra weight of the Stillen cancels out the moderate gains over the Injen exhaust which weighs less? Any thoughts?

 

And your basing this off of???

Also which one are you referring to? The Fujitsubo Ti or Legalis R?

 

weight has many factors to it. only thing that helps every aspect of performance across the board, of course we are talking ~25lbs, nothing massive, but neither are the additional gains.

as Ive said before, I call BS on anyone that can tell the difference between stillen, injen, borla or nismo. matter of fact... I would place money youd get 5 out of 5 at best for stock vs any aftermarket exhaust that the driver could tell.

seriously, we are talking 6hp peak... out of 287, thats a 2% increase at peak. come on...

you can consider weight, but its not much more decisive than the HP differences. only stillen sticks out from the pack, and its just fitting that it has the most HP, so how can you deny any of them based on weight or HP? its trivial.

listen to them look at them.

choose by appearance, sound, and quality. these are the 3 things that are actually noticably different

 

We recently had a dyno day here in Arizona. There were 4 different exhausts and a stock exhaust. The Borla out performed all of them, but the NISMO looks the best. The other two were a B&B and a GHL.