There are so many out there.. power wise, how do they stack up?

 

The Borla true dual won the Sport Z shootout, but if you want more specifics, the search function should take care of it.

 

just get test pipes.. much cheaper. more power!

 

test pipes+ injen = HOLY **** Loudness and a good 15-20hp

 

yeah i got about 15hp with test pipes and intake

 

I have this set-up, and yes its VERY loud, but I love it. I'm going to be dynoing hopefully within 2 weeks, now that I have i/e/tp/plenum....my car definetely pulls harder up top than when I just had a K&N. Was the Injen included in the Sport Z shootout?

 

i did some searching myself because i am getting ready to buy an exhaust also. here is a link from a member on this site that includes various exhaust gains, weights and sound clips

exhaust link

some believable and some not but good info...enjoy...thanks isaac

 

I would not go with the test pipes, cops will hear you coming. I went with the Injen true dual exhaust, due to least bends or restrictions coming back from cat's. I don't think anyone can beat that one for performance.

 

yeah I found that odd actually. without any doubt; the injen has the least bends. sound is a byproduct of a low resistance system. I dont know this for certain; but Id bet if someone put a compressor to the injen; theyd get the least back pressure of the 3 duals(injen, borla, stillen).

meanwhile the borla would appear to have the most bends; and possibly the most backpressure. closest to stock of the 3 IMO.

yet borla came away as the winner. how does the setup closest to stock gain the most? I know thats a bad questions; just doubting the claims with no real reasoning, but owell.

 

Interesting site. I like the format and the summary. But I must question the numbers.

They list 23 RWHP for a Borla True Dual. I have the Borla, and as much as I wish it was true, I can not believe my RWHP increased by 23 from the exhaust. Where did they get these numbers?

The guys running the dyno at XX Tuning said the Borla was good, and that they saw gains on the order of 12-15 hp.

 

I think what you proved is that you can't judge an engineering project by looks alone. Sometimes things that "look like they should work" don't and vice versa.

I have seen some beautifull designs that suck, and some ugly designs that kick butt.

In the case of exhaust, perhaps lower back pressure is not the only measure. An engine needs some back pressure or the torque will drop. Also, the Borla is clearly tuned for a resonance around 2K rpm. My guess is that they tuned the shapes to resonate where the torque curve is low to put some power where it is most needed. There may be other resonances at other speeds that I can't hear.

I know tuned exhausts are BIG in motorcycles and airplanes. Maybe Borla did something along those lines?


Does the injen have the crossover pipe. (H-pipe). That is one thing I liked about the Borla. An H pipe can really help alot and the Borla h-pipe is short to boot.

AndyB

 

based on what i have read most of those numbers come from either the manufacturer or that Z exhaust shootout article which i have not seen for myself yet....still hard to believe borla is making double the power of everyone else....those articles are not always accurate either if they favor a certain manufacturer...so who knows

12-15 is more believable and still better than stillen, amuse and the likes

 

im stuck with the whole exhaust question too. Right now im choosing between borla and nismo. I haven't heard any exhausts in person, only sound clips. I can't really judge from sound clips because, imo, they kind of sound the same. I just go by what i read from these forums and that's how i came to my decisions so far. From what i gathered, Nismo for sound, and small, but reliable gains. As for the Borla, the sound is very similar to stock, but some people claim nice gains from it, but others dont. If the Nismo was cheaper, i would probably go with it, but im hoping that if i get the borla, i would recieve the same gains as others have claimed.

 

Hey guys I don't know how many of you have the sport z magazine issue, but I don't think there is no clear winner out of the bunch. Besides the 5 Zigen, I think the BORLA, INJEN, NISMO and STILLEN are all good exhausts.

They all have certain pros and cons that will fit each person and if they like for example weight savings, price, sound etc.. As far as power goes I think they are all fairly close.

Just my 2 cents

 

i have driven a car with the Nismo exhaust and the sound is really nice...slightly louder than stock and the quality looks to be excellent

i am leaning towards the stillen which is around the same price as the nismo...but, i may wait until i can hear it in person...if its not too loud than thats the one for me most likely

i think strictlyz makes a good point about the power so it all depends on what features you're after....good luck with your decision

 

Nice site for exhaust comparrison. It is still hard to believe some of these gains. When you think about it, is a 3HP difference really that noticeable? Undecided b/w NISMO and Borla. I am trying to stick with NISMO, however.

 

How about the Fujitsubo?

 

Stillen by far won the shootout when you look at HP and TQ, but is heavier than stock. Borla generated hardly any TQ gains (peak). Injen had about .6HP less than borla but considerably more torque.

Injen and Stillen are the best performance wise, followed by Borla.

X

 

I have been reading the exhaust threads for a while now.......and I have concluded from the responses of the forum members which is the system with the most gain and best sound........without fail it is the system that they have already purchased and installed, regardless of brand.....lol

I have a Borla exhaust and am happy with the sound when coupled with the RT Cats. The Borla is a dual catback exhaust. It comes in many pieces with many joints to clamp. The more joints there are, the more places for potential exhaust leaks. The H pipe joint has caused problems for many people in that it often leaks, especiallywith the added pressure of high flow cats.

The 350Z was not designed for a true dual exhaust. The undercarriage (the rear sway bar especially) was not made with a lot of space for a passenger side pipe to come back to the rear muffler box. Because of this, there are sometimes rattling issues.

As I said, I have the Borla and am fairly happy with it. If I had it to do over however, I would not go true dual and would instead opt for the Nismo exhaust. It has an equal if not better sound than the Borla, is very high quality and does not have the issues associated with a pipe going where it is not supposed to go.

 

You might want to do your homework on how horsepower is produced. putting a performance exhaust system alone is not going to give you over 20 mor HP. Less restrction dose not always mean more horsepower. Some engine are designed to have a certain amount of back pressure. If you free flow the engine to much you may actualy decrease the HP. Remember the testing you see in magazines and on brand type websites are trying to sell you something. The best people to talk to are people who have tried several types of exhaust on their car and have no out side interest. Usually in an engine this size with the best performance exhaust out there you will probably only see about a 10 HP increase maybe 15. If you can prove me wrong the post the actual dyno test results and a picture of your car that only has an exhaust up grade and nothing else. Now this is based on a 350 Z and it has the catalytic converts still on and not hollowed out.