Confused between AAM axleback or Invidia Gemini catback for Nismo

Rahul718 · 09-09-2015, 01:10 PM

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

Hotrodz · 09-09-2015, 01:23 PM

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.

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Rahul718 · 09-09-2015, 01:30 PM

Quote:

Originally Posted by Hotrodz

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.

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Solid advice. Thank you Hotrodz

Hotrodz · 09-09-2015, 01:31 PM

You are welcome...

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EzDz · 09-10-2015, 07:38 PM

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.

jcosta79 · 09-10-2015, 10:13 PM

Quote:

Originally Posted by Rahul718

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

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.

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jcasti07 · 09-27-2015, 07:55 PM

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

2011 Nismo#91 · 09-28-2015, 09:09 AM

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.

robi_k · 09-28-2015, 09:25 AM

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.

09-09-2015, 01:10 PM	#16 (permalink)
Rahul718 Base Member Join Date: Nov 2013 Location: NYC Posts: 233 Drives: Nismo Z Rep Power: 11	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 Last edited by Rahul718; 09-09-2015 at 02:13 PM.

09-09-2015, 01:23 PM	#17 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	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 Rahul718 likes this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

09-09-2015, 01:31 PM	#19 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	You are welcome... Sent from my SM-N910P using Tapatalk __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

09-10-2015, 07:38 PM	#20 (permalink)
EzDz Enthusiast Member Join Date: Aug 2015 Location: Pittsburgh Posts: 309 Drives: 2016 370z Nismo Tech Rep Power: 9	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. 2011 Nismo#91 likes this.

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09-27-2015, 07:55 PM	#22 (permalink)
jcasti07 Base Member Join Date: Feb 2012 Location: El Paso Posts: 171 Drives: red '15 Mustang GT Rep Power: 13	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

09-28-2015, 09:09 AM	#23 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,385 Drives: slowly Rep Power: 37213	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.

09-28-2015, 09:25 AM	#24 (permalink)
robi_k Base Member Join Date: Jun 2015 Location: Toronto Posts: 15 Drives: 16 370z Nismo PW Rep Power: 9	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.