Confused between AAM axleback or Invidia Gemini catback for Nismo
 

Hey guys,

Having a tough time between these two. I've listened to sound clips, seen pics, etc but still cannot decide. The AAM axleback will run me $750 (including $80 cost for the 5" tips for the Nismo) whereas a local shop is running a deal on the Invidia Gemini Catback for $950 installed. My budget is no more than $1000 and sound is my priority. Just want a bit more rumble for the Nismo.

However, any extra HP in the process would be welcomed. Does anyone have either of these setups on their Nismo? If so, any dyno-proven HP gains and could you share some pics? And how are you liking the setup?

I've read that the Invida causes a HP loss in some cases. Is there any validity to this? It also doesn't have a flex section...is this a problem?

Thanks

Follow up question. I thought the NISMO stock exhaust was already opened up a bit more than the non-Nismo exhausts.

Wouldn't you just want to replace the cats with some HFC or test pipes instead?

I believe it is, but I'm looking for some sound. Test pipes would be too raspy (I had a similar setup on my old 350z) and HFCs might be too quiet for the sound I'm looking for

Edit: I think you might be talking about the Nismo S-tune exhaust, which actually had proven HP gains over the regular 370z exhaust. The exhaust that comes with the Nismo is not the S-tune and I'm not even sure it's any more free flowing than a regular 370z exhaust

I did not know that. :tup:

The AAM axle back system looks great and sounds awesome, it is on the loud side and you will get some rasp with it at about 3500rpms...there is little no gain in horse power. The Invidia is not a bad choice but I would by a used Fast Intentions exhaust as they are great looking and sound better. A full exhaust will give you noticeable gains horsepower. If you don't have the cash for a cold air intake, I would get K&N drop in air filters and you are good to go.

Problem with the axleback is I don't find it sounding any more different than the OEM exhaust

https://www.youtube.com/watch?v=fr05ZC6IGR0

Are you talking about the AAM short tails? It sounds like you are. Here is the axleback I'm looking at from AAM:

AAM Competition - Nissan GT-R, 370Z Turbo Performance Specialists

As opposed to the short tails which I do NOT want:
AAM Competition - Nissan GT-R, 370Z Turbo Performance Specialists

Roger that...regardless I would still go with a 2.5" exhaust over just the axle back. The Nismo exhaust, though better than the oem is still restrictive. A bett flowing exhaust will give you better sound and performance. Take it from me send wisely the first time because it going to cost you even more when you are unhappy with your first decision. Here was my journey....AAM short tails, AAM true dual exhaust and now my current set up, Fast Intentions 3" exhaust.

Sent from my SM-N910P using Tapatalk

You're 200 dollars away form a Fast Intentions Non-Res... Just save up! Sounds awesome and has the most power...

It is tempting...

This one right? The TDX?
Fast Intentions

Shipping is an extra $130, so that's $1260 to my door, plus another $100 or so for the install (I'm not doing it myself - no space).

The Invidia Gemini is $950 installed. That's a $400 savings...

I did find out that the Invidia system does not have a flex pipe... this worries me a bit. It should have a flex portion for obvious reasons

Dude there is a guy selling it on here for 1100 OBO... Doesn't hurt to see how much hell bargain. He only used it a month. Let me see if I can find the link....

Edit: http://www.the370z.com/parts-sale-pr...-1100-obo.html

There. Of course, if you don't want to buy used, thats another story.

Thanks man, I missed this one. I have no issue buying used at all. I will hit him up!

:tup:

Just found this... isn't this a really good exhaust for a really good price?

HKS 32009-BN004 Hi-Power Exhaust Nissan 370Z

FI is still better on all accounts!!!

Sent from my SM-N910P using Tapatalk

I think I'll settle for a FI catback. However, a vendor here who I've done business with before is giving me a great price for the HKS true dual setup.

My question is this. Is the Nismo oem exhaust on my car right now a true dual exhaust? If not, and if I get an aftermarket true dual setup, would that require a tune? I don't have intakes or test pipes/HFCs, etc, but if this exhaust will change the setup, I'm thinking a tune may be necessary compared to an exhaust like Invidia that isn't a true dual exhaust

Okay, the Nismo exhaust is an H or dual exhaust system. It is not bad but it is not 2.5" all the way through. FI is an X pipe system, both of these systems have pluses and minuses but are much better than the Nismo exhaust system. You don't have to get a tune with any of them as the ECU will learn and make adjustments. A tune will benefit you in other areas like throttle response and maximizing your performance, but I would wait until you add a cold air intake and test pipes or HFC. Don't over think it right now because you only have so much money for mods. Get the parts first and then get a tune.

Sent from my SM-N910P using Tapatalk

Solid advice. Thank you Hotrodz :tup:

You are welcome...

Sent from my SM-N910P using Tapatalk

You can do what im doing and get short tails for the instant noise gratification and get a shop to build you a custom kit, Ask them for the price on whatever you want it cant hurt. Im getting a 2.5 custom x pipe, stainless works resonators and maybe a muffler, no cats $700 installed.

Go with the Invidia. I have it on my Nismo and I gained torque. Sound is awesome. I already had intakes, test pipes and a tune and I still picked up power with the Gemini. Well worth the money.

Sent from my Nexus 7 using Tapatalk

I guarantee you're going to find the aam short tails too loud. Had them on my nismo for just a few weeks before I went stock, then I saved up for my fast intentions CBE

I won't get too hung up on diameter, your down pipes are 1.75", you can have a dual 10" exhaust but you'll still be going through a 1.75" tube. A better designed X or H pipe systems with less steel wool in the muffler (louder) will provide the most power increase. Removal of the steel wool from the oem nismo axle back would provide gains similar to most aftermarket system, though not sure about the quality of the sound. I've only seen one person do it so far though but it would be the lowest cost alternative.

I have an E370 Motordyne exhaust and ART pipes. You would definitely feel the gains on the car. I went for a baseline dyno and got 323hp and 269tq, with no CAI.

I will be going for a tune in two weeks to get proper numbers.