Nismo Cat Back
 

How come there is not much speak about the NIsmo catback? Is it total crap for the $1800? Its endorsed by Nissan.

Please dont say search the Forum for your answer. That is just lame.....................

forum search you will.

No point getting a nismo exhaust. The nismo exhaust is still pretty restricted compared to what is out there. Just go for the HKS Hi-Power for 1800.

because it is a utterly pointless, overpriced product.

seriously there are so many better exhausts that have better results/sound.

it is nissan endorsed so it is expensive. everything you buy from nissan is expensive.

even bolts.

S-tune or OEM?

Getting one used would be a decent upgrade over the regular OEM exhaust. $1800 is too much -- aim for less than half that for a good deal.

I doubt it's all that bad, and I bet it's even within 1 or 2 hp of other products. Nothing about it looked like a bad design, although folks say it's a bit quiet. Probably goes well with HFC's. People just buy other exhausts because they are cheaper or give a particular "look" (basically why I bought mine).

Also from what I understand, true duals v. H-pipe v. X-pipe shouldn't make any real difference in performance since the VQ is an even firing engine. It's more for tuning sound than anything else.

OEM Nismo Z nismo exhaust is an H pipe design and is pretty decent but I think that the nismo exhaust you buy from nissan (s tune) is still a y pipe so it could def be better imo.

i dont know what all the hating is about, but Ive been down the FI road and the nismo s-tune road and have to say I prefer the s-tune any day. price could be iffy unless you get it used like jordo or at a hell of a deal new like i did. It sounds great, looks great, frees up so much top end resistance and maintains the low end back pressure that makes daily driving much smoother. It fit my purpose and that about it, may not fit yours though.

is the OEM nismo muffler better flowing than non nismo oem? i'm guessing it has to be right??

yeah, but not as free flowing as other aftermarket mufflers. But don't forget that too free of a flow has a negative effect on back pressure that cant be fixed without a tune. Compared to when I had the FI, i can appreciate the amount of back pressure the nismo maintains whereas the FI made the low RPM's suffer from a slight bog.

...but anything in the world is better than stock!

true!! haha

As the reason why I kept my stock nismo exhaust along with my long tube headers. :tup:

got a sound clip?

There is no compelling evidence that any of the aftermarket exhausts out there give you much more than a few HP over the Nismo. In other words, if you had a car with intake, exhaust and tuning, you most likely will only see a few hp from one of the louder aftermarket exhausts.

It really boils down to whether or not you like the sound of the 370Z uncorked. The only aftermarket exhaust I've heard is the GReddy Ti-C (without the silencers) on stock cats and I thought it sounded terrible and ricey. This was when I was buying my OEM Nismo, which I paid $450 for from the guy who put the Ti-C on his car.

The OEM Nismo is barely louder than stock, at least from inside the car. I later added Fast Intentions resonated HFC's and the sound level barely increased. Not too sure what the car sounds like from outside, although from inside my underground parking garage, it is definitely noticeably deeper and louder when I start the car up. Were I to do it again, I'd probably go for resonated test pipes (resonator gets rid of a bad exhaust rasp at ~2700 rpm, right where you cruise a lot).

Bang for the buck, you absolutely can't go wrong with a take-off OEM Nismo. Add the resonated test pipes and a Stillen Gen 3 intake and you'd probably have a really nice sound under throttle. The nice thing about getting your sound from an intake is that it only makes a bunch of noise at WOT, so the car is still very quiet for cruising.

That is sound advice. ha!

thanks a bunch.

Nope. Its kinda raspy though. Im thinking I may take them off and use some header wrap on them to help out with the rasp. It makes good power though. I will be dynoing here in the next week or so. Ill post up the results on my dyno thread.

That seems odd to me. I thought getting test pipes (non-resonated or even resonated) would cause a lot more rasp than hi flow cats. I was assuming more sound is being resonated in an actual catalytic converter.

there is definitely rasp if you add test pipes (resonated or not) or high flow cats to the nismo exhaust. i believe the H pipe is the culprit here. the new cats/tp's go from 2.5" pipe to the 2.25" flex pipe flanges, which end at 2" to the midpipe/resonators.

a member in the nismo forum said he added a custom 2.5" x-pipe which got rid of all his rasp. im determined to go this route as well...as soon as someone makes one!

What about those cheap Y-Pipes from Ebay coupled with the rest of the Nismo exhaust? I do not mind the rasp if it goes away upon warm up.

a Y-pipe will not work..only the stock Z has 2 catalytic converters joined to a single pipe. nismo owners will require an X-pipe

http://i55.photobucket.com/albums/g1...s/IMG_1745.jpg

I have the Nismo OEM exhaust with FI resonated HFC's and I can definitely tell you that my car does not have any noticeable exhaust rasp.

I also find it funny that everyone really gets on the piping diameters of the H pipe. Having stepped piping sizes is actually totally normal and can actually aid in the scavenging effect of the exhaust system. Think about this in terms of total cross-sectional area: passing the exhaust through two 2" diameter pipes is a greater cross-sectional area than passing through a single X or Y pipe.

The advantage of an X pipe has nothing to do with cross sectional area. It has to do with easier flow between the two sides of the exhaust due to a smoother transition compared with an H pipe. An X pipe will also have the effect of making the exhaust quieter from noise cancellation due to the easier cross flow of the two legs. The H pipe configuration is not a bad design in essence, which is why people have only seen small gains from other exhaust systems.

Here's a decent link about putting an X pipe exhaust system on a car:

Exhaust System Installation H-Pipe, X-Pipe,- Car Craft Magazine

this is fine by me! more power, less rasp, cant go wrong with the X-pipe..

Yes, that is my fault. It was totally obvious. I guess the late shifts I had this week is taking a toll on my brain, lol.

Which is why if I were to recommend an aftermarket exhaust, it would be the Fast Intentions (even though I really hate the look of having the visible polished/angled mufflers under the car). All I'm saying is that even with the H-pipe in my OEM Nismo exhaust, I'm not getting any raspiness. This may be because of my resonated HFC's, which as far as I can tell I'm one of two people on this forum to own, the other guy being in Australia. Perhaps removing either the cat part or the resonator part (which would describe the setup that 99% of the people here have) induces some raspiness that I'm not getting.

yea..ive already approached fast intentions in hopes that they will create an X-pipe for us nismo owners :tup:

I had the Nismo S-tune exhaust with both stock and Berk cats for about 10k miles. It's a well made piece, but overall I was disappointed with it. Sound wise it's just barely louder than stock, a tad deeper only when it warms up. I was mostly let down when I went to the Berk cats though, power improved a bit but the sound level was still far too quiet... I'd say the same type of sound level increase from stock to S-tune. I must say when I switched to the FI exhaust I had an immediate noticable power increase. When you sit the OEM and S-tune exhausts side by side, the S-tune is essentially just a polished version of stock, with "slightly" larger piping. Good for those who would want a shiny muffler and some bling, but no way worth the 1500+ they ask. Considering I ran almost every Nismo part for my old 350Z, the current 370Z line parts are a let down. The 350Z S-tune exhaust was far superior in performance/sound/cost IMO.

When you say "immediate noticable power increase" did you run it on a dyno and verify?

Ive gotta disagree on the piping size, the s-tune is much larger that stock, especially at the y-pipe choke points and flex pipes.

^^ true it is larger

Actually an X pipe works as a vacuum on the exhaust side. The crossover helps pull the exhaust out. Kinda like using vacuum on the intake side to run power brakes or opening up throttle bodies. It helps helps pull the oxygen through the engine. (Add's power)