Performance numbers or objective reviews of aftermarket exhaust vs Nismo

Originally Posted by forza370z

I am not trying to talk down a company here why would I. I am simply telling the truth what happened to my car. Matter of fact I still think FI exhaust is a sick exhaust system. But I just want to give OP a heads up the exhaust won't give you much differences on NA cars. Not just fast intensions but all aftermarket exhaust in general. It's better then misleading people here. I probably will get FI exhaust myself again but I could care less about the performence gain not untill I boost my car.

Originally Posted by Armhunter

Sorry, didnt imply you was, just saying no one should. Unless they have taken all the steps. Didnt mean for it to come out that way..

I am getting a tune right after I get my FI exhaust and Test pipes installed. I will let you all know, but it wont be until Dec.

Originally Posted by forza370z

No worries buddy. Keep us posted on how the result turns out. But one thing for sure you will love how the FI exhaust sound like.

Originally Posted by forza370z

OP, this is a good thread and I hope people here be honest and tell the truth.

Before I got everything on my g35 coupe 2 years ago, I did whole lot of researches on the forums. People on the internet were singing of how awesome the F.I. exhaust sound like yet not to be too loud, how hard it pulls, how much hp gained... I was super excited to order mine. After I installed FI HFC and FI carbon fiber exhaust here is what I can say. It sounds really awesome no doubt. It's loud(not qieut like some people declared but I liked it). It looks great too especially the carbon fiber canister. Top notch quality hands down. As far as the performance gain from my butt dyno, it's definitely different from the stock. I lose low end but gain at high end. The annoying part is at 2-4k rpm when the exhaust starts to get really loud the car doesn't go faster. This was my only complaint. When I switched back to stock the car felt much faster and responding. But the FI exhaust kickes in after 5k rpm while the stock gets sluggish.

So if you ask me about the performence gain, I am not very impressed(as almost all aftermarket exhausts on NA cars). You might feel power lose at normal driving. F.I. declared 20 wheel hp gain and that might be true after a fine tune. But will it make day and night different? Don't get too excited. Think about this way, the Nismo declared 18 hp gain over the stock. But if you check the entire forum, how many people actually saying the Nismo outperform the stock. Bottom line is it's a sick exhaust but not really makes much differences on performence gain.

Originally Posted by 280z/300zx

The nismo exhaust has been shown to give 7 HP gain on a regular 370z. When you consider that fi CBE yeilds roughly 15-20 gain its easy to say that the fi exhaust is the better of the two. I didn't bother dyno testing mine but there was a noticible difference on the butt dyno. The sound alone is worth it, the power gain is just a plus. Those who lost power were because of multiple other nods in conjunction with the exhaust with out a tune. The more mods, the more a tune becomes important.

Originally Posted by Rusty

Did any of you guys read post number 7? And add up the numbers?

Originally Posted by fuct

yea i did.... it cost you over $3500 for 38 HP.

Originally Posted by Armhunter

Yep, that is about what I spent for my upgrades.

$500 still cold air intake
$500 FI test pipes
$1800 FI exhaust, carbon fiber mufflers
$5-600 UpRev tune..

I know these are not exact prices, but they are close.

Anyone think I will hit 400HP?

Originally Posted by 2011 Nismo#91

Nope. All the NA mods available won't get a Z to 400 imo.

Performance wise here is some info on the nismo exhaust.
two different nismo exhaust????? (nismo car ver and S-tune ver?)

The base Z is 332hp
The Nismo exhaust adds about 8hp alone. So the Nismo's Tune adds the other 10 to get to 350hp.

So saying the FI exhaust addes 20hp to a Z seems about right, 10hp (as apposed to 8hp) or so because it's slightly larger and less restrictive with the other 10hp coming form the Tune.

So you better really like that sound because your paying alot of money for 2hp and losing a lot on selling a used exhaust.

Originally Posted by SurfDog

Or if you want to be smog legal high flow cats get you close to test pipes.

Originally Posted by 2011 Nismo#91

So saying the FI exhaust addes 20hp to a Z seems about right, 10hp (as apposed to 8hp) or so because it's slightly larger and less restrictive with the other 10hp coming form the Tune.

So you better really like that sound because your paying alot of money for 2hp and losing a lot on selling a used exhaust.

Originally Posted by 2011 Nismo#91

So saying the FI exhaust addes 20hp to a Z seems about right, 10hp (as apposed to 8hp) or so because it's slightly larger and less restrictive with the other 10hp coming form the Tune.

So you better really like that sound because your paying alot of money for 2hp and losing a lot on selling a used exhaust.

Originally Posted by KingJoseph

Is this correct? Is the vehicle that FI dyno'd for their chart (showing a 20hp gain) tuned? I was under the assumption that it was simply bolted on and dyno'd.