Project G-370 exhaust

Fantastic Z · 03-30-2014, 09:11 PM

Alright so here is a long story short. The OEM exhaust note for the 370z sucks. Simple as that. Due to sound ordnance changes in 09+ Japanese vehicles. The exhaust was altered from the famous stock VQ note that out sister car the G37 coupe is known for(it was grandfathered in as of 08+). Many of you upgrade to aftermarket exhaust but, from the start I REALLY wanted this OEM G coupe sound for my Z.

I have a bead on a OEM G37 coupe exhaust that will be shipped to me this week, hopefully. I will update this thread with my progress of fabbing up the mid-pipe and muffler to bolt/fit it properly. This thread here 370Z With Stock G37 Coupe Muffler Swap
gives a bit more insight to why I'm doing this and vids are in post #11. Positive feedback is welcome as well as opinions or suggestions. I just don't want negative or un-helpful replies.

Thanks

NickTurnon · 03-30-2014, 09:15 PM

If you end up doing this - Add it to my thread I started!
Official Custom Exhaust Thread & Dyno #'s

Fantastic Z · 03-30-2014, 09:28 PM

Quote:

Originally Posted by NickTurnon

If you end up doing this - Add it to my thread I started!
Official Custom Exhaust Thread & Dyno #'s

Oh no worries I definitely WANT to finish this and will gladly add to your thread once I'm done

This will be my first attempt at a custom exhaust for the Z but, not my first attempt at a custom exhaust

Here is my modified N1 exhaust for my 240sx. Magnaflow resonator welded in and painted high-temp black. Sounded SOO much better than a bare bone N1 for the 240 lol
Custom S14 exhaust.jpg

jaytirbhaw · 03-31-2014, 08:10 AM

nice !

luigi90210 · 04-01-2014, 05:39 PM

all you need to do is swap mufflers to get the sound

Chuck33079 · 04-01-2014, 05:41 PM

Quote:

Originally Posted by luigi90210

all you need to do is swap mufflers to get the sound

Yep. Bolts right up.

jwick · 04-01-2014, 05:43 PM

Quote:

Originally Posted by luigi90210

all you need to do is swap mufflers to get the sound

Agreed. I traded my OEM muffler to a Z guy for a handle of Marker's Mark. He bolted it right up

Fantastic Z · 04-01-2014, 07:35 PM

Hmm...
Well in the thread linked in the OP there was quite a bit of talk about the resonators being different. I know for a fact the Y-pipe is different. The G y-pipe having smaller inlet diameter (1.8" G vs 2" Z). Im having the G coupe exhaust shipped to me fairly cheap so, its worth the experiment.

jwick · 04-01-2014, 08:36 PM

Quote:

Originally Posted by Fantastic Z

Hmm...
Well in the thread linked in the OP there was quite a bit of talk about the resonators being different. I know for a fact the Y-pipe is different. The G y-pipe having smaller inlet diameter (1.8" G vs 2" Z). Im having the G coupe exhaust shipped to me fairly cheap so, its worth the experiment.

Where did you get the G and Z y-pipe being different? I've physically laid both on top of each other and they are identical. Resonators, I'm assuming you are referring to the weighted black fucknuckle bolted on the y-pipe, are both in the same location. The only difference I've seen is in the mid-pipe

Fantastic Z · 04-01-2014, 08:45 PM

Quote:

Originally Posted by jwick

Where did you get the G and Z y-pipe being different? I've physically laid both on top of each other and they are identical.

I too had them next to each other and when you measure the internal diameter on the inlet side using a measuring caliper. The G coupe pipe is 1.8" inlet and 2.4" outlet. Both Y-pipes measure 2.4" outlet but, for some reason the G coupe piping is smaller. 08 G coupe Y-pipe vs 09 Z Y-pipe

Fantastic Z · 04-01-2014, 08:46 PM

And the small round rubber/metal pieces (A.K.A weighted black fucknuckle lol)on the exhaust are harmonic dampeners. They simply eliminate certain frequencies induced by vibration.

jwick · 04-01-2014, 08:58 PM

Quote:

Originally Posted by Fantastic Z

I too had them next to each other and when you measure the internal diameter on the inlet side using a measuring caliper. The G coupe pipe is 1.8" inlet and 2.4" outlet. Both Y-pipes measure 2.4" outlet but, for some reason the G coupe piping is smaller. 08 G coupe Y-pipe vs 09 Z Y-pipe

You could very well be correct there. I was only concerned with flange locations and didn't measure pipe O.D. Maybe the O.D. difference is where the extra 2hp comes from.

Chuck33079 · 04-01-2014, 08:59 PM

So if the Z Y-pipe is a greater ID, you would use that, correct?

Fantastic Z · 04-01-2014, 09:00 PM

Quote:

Originally Posted by Chuck33079

So if the Z Y-pipe is a greater ID, you would use that, correct?

Correct. I will be using my Z y-pipe and the rest will consist of G coupe exhaust parts.

jwick · 04-01-2014, 09:02 PM

Quote:

Originally Posted by Chuck33079

So if the Z Y-pipe is a greater ID, you would use that, correct?

I would. I can see Nissan changing the O.D. of that 18" of y-pipe so that the Z would have better HP numbers.

03-30-2014, 09:11 PM	#1 (permalink)
Fantastic Z Base Member Join Date: Sep 2013 Location: Nashville, TN Age: 34 Posts: 197 Drives: 10' T/S 7AT Rep Power: 11	Project G-370 exhaust Alright so here is a long story short. The OEM exhaust note for the 370z sucks. Simple as that. Due to sound ordnance changes in 09+ Japanese vehicles. The exhaust was altered from the famous stock VQ note that out sister car the G37 coupe is known for(it was grandfathered in as of 08+). Many of you upgrade to aftermarket exhaust but, from the start I REALLY wanted this OEM G coupe sound for my Z. I have a bead on a OEM G37 coupe exhaust that will be shipped to me this week, hopefully. I will update this thread with my progress of fabbing up the mid-pipe and muffler to bolt/fit it properly. This thread here 370Z With Stock G37 Coupe Muffler Swap gives a bit more insight to why I'm doing this and vids are in post #11. Positive feedback is welcome as well as opinions or suggestions. I just don't want negative or un-helpful replies. Thanks __________________ Rays GramLights 57Fxx BM w/red centers-Michelin Pilot Sport tires-Motordyne CBE-Nismo red calipers-Z1 (SS lines/Slotted rotors)-Motul fluids-Whiteline diff bushings-Redline fluids-JDM fog lamp-GTR start button-Optima Yellow Top-EVO-R B pillars-Custom GPS mount

03-30-2014, 09:15 PM	#2 (permalink)
NickTurnon A True Z Fanatic Join Date: Jul 2011 Location: Scottsdale Age: 33 Posts: 1,636 Drives: 09 BS 7AT 370z Rep Power: 17	If you end up doing this - Add it to my thread I started! Official Custom Exhaust Thread & Dyno #'s __________________ 2009 Brilliant Silver BASE 7AT \| TEIN S-Tech Springs \| K&N Drop Ins & z1 Maf Tubes \| AAM S-Line Short Tails \| 5% Tint \| 20MM Spacers \| Sport Spoiler NickTurnon's 370z Build

04-01-2014, 05:39 PM	#5 (permalink)
luigi90210 A True Z Fanatic Join Date: Apr 2012 Location: San Diego CA Posts: 1,103 Drives: Classified Rep Power: 15	all you need to do is swap mufflers to get the sound 2011 Nismo#91 likes this. __________________ SOLD 370z New Car:classified DD:2011 Mini Cooper S stock

04-01-2014, 07:35 PM	#8 (permalink)
Fantastic Z Base Member Join Date: Sep 2013 Location: Nashville, TN Age: 34 Posts: 197 Drives: 10' T/S 7AT Rep Power: 11	Hmm... Well in the thread linked in the OP there was quite a bit of talk about the resonators being different. I know for a fact the Y-pipe is different. The G y-pipe having smaller inlet diameter (1.8" G vs 2" Z). Im having the G coupe exhaust shipped to me fairly cheap so, its worth the experiment. __________________ Rays GramLights 57Fxx BM w/red centers-Michelin Pilot Sport tires-Motordyne CBE-Nismo red calipers-Z1 (SS lines/Slotted rotors)-Motul fluids-Whiteline diff bushings-Redline fluids-JDM fog lamp-GTR start button-Optima Yellow Top-EVO-R B pillars-Custom GPS mount

04-01-2014, 08:46 PM	#11 (permalink)
Fantastic Z Base Member Join Date: Sep 2013 Location: Nashville, TN Age: 34 Posts: 197 Drives: 10' T/S 7AT Rep Power: 11	And the small round rubber/metal pieces (A.K.A weighted black fucknuckle lol)on the exhaust are harmonic dampeners. They simply eliminate certain frequencies induced by vibration. __________________ Rays GramLights 57Fxx BM w/red centers-Michelin Pilot Sport tires-Motordyne CBE-Nismo red calipers-Z1 (SS lines/Slotted rotors)-Motul fluids-Whiteline diff bushings-Redline fluids-JDM fog lamp-GTR start button-Optima Yellow Top-EVO-R B pillars-Custom GPS mount Last edited by Fantastic Z; 04-01-2014 at 08:52 PM.

03-31-2014, 08:10 AM	#4 (permalink)
jaytirbhaw Track Member Join Date: Dec 2009 Location: NYC Posts: 814 Drives: 350z HR , Nismo 370z Rep Power: 16	nice !

04-01-2014, 08:59 PM	#13 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	So if the Z Y-pipe is a greater ID, you would use that, correct? __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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