2015+ exhaust manifold vs older

Jhill · 07-14-2018, 04:00 PM

So I just heard that the 2015+ exhaust manifolds are different than previous years. Anyone seen this or have pics?

Rusty · 07-14-2018, 05:03 PM

Why would they change them. The Z hasn't changed in 10 years. LOL

Jhill · 07-14-2018, 06:39 PM

That’s what I thought too but someone was saying the 2015+ have a different design at the collector (more like the z1 with a 3-1 with individual ports). Not sure if they are mistaken.

sizziano · 07-14-2018, 07:49 PM

Quote:

Originally Posted by Jhill

That’s what I thought too but someone was saying the 2015+ have a different design at the collector (more like the z1 with a 3-1 with individual ports). Not sure if they are mistaken.

What's their source on that? If they don't have one then...

husam2012 · 12-07-2018, 01:33 PM

Just letting who might be searching for this in the future; the 2015s do have a better exhaust manifold design. They actually don’t bolt up to the older engines because the studs are in a different location (the older heads don’t have 4 stud spots)
The pipes flow smoother and it’s more than likely that this causes the newer cars to dyno slightly higher.

OptionZero · 12-07-2018, 02:03 PM

thats quite interesting, nissan actually snuck in improvements without sayin nothin?

Jayhovah · 12-07-2018, 02:11 PM

Any 370z OEM exhaust manifold improvement should have included a turbo.

Rusty · 12-07-2018, 02:26 PM

Quote:

Originally Posted by husam2012

Just letting who might be searching for this in the future; the 2015s do have a better exhaust manifold design. They actually don’t bolt up to the older engines because the studs are in a different location (the older heads don’t have 4 stud spots)
The pipes flow smoother and it’s more than likely that this causes the newer cars to dyno slightly higher.

So anyone building a motor has to watch out if they are using different heads and exhaust manifolds.

Wonder if the FI makers know this.

Spooler · 12-07-2018, 02:29 PM

Quote:

Originally Posted by Rusty

So anyone building a motor has to watch out if they are using different heads and exhaust manifolds.

Wonder if the FI makers know this.

Many cars 2015 or greater have had Fast Intentions TT kits installed.
Doesn't appear to be an issue with their kit.

husam2012 · 12-07-2018, 02:47 PM

Quote:

Originally Posted by Rusty

So anyone building a motor has to watch out if they are using different heads and exhaust manifolds.

Wonder if the FI makers know this.

The good thing about the 2015 and newer cars is that they are also compatible with the older headers, just have to move the studs around. Unfortunately the older ones don’t have the heads drilled in all 4 possible spots.

Sent from my iPhone using Tapatalk

Rusty · 12-07-2018, 03:58 PM

Quote:

Originally Posted by husam2012

The good thing about the 2015 and newer cars is that they are also compatible with the older headers, just have to move the studs around. Unfortunately the older ones don’t have the heads drilled in all 4 possible spots.

Sent from my iPhone using Tapatalk

So the newer heads have both sets of holes already drilled and tapped then.

husam2012 · 12-07-2018, 04:09 PM

Quote:

Originally Posted by Rusty

So the newer heads have both sets of holes already drilled and tapped then.

Correct! Forgot the right words lol but yeah the newer motors are a little nicer.

Sent from my iPhone using Tapatalk

Justint5387 · 12-07-2018, 05:39 PM

Quote:

Originally Posted by husam2012

Just letting who might be searching for this in the future; the 2015s do have a better exhaust manifold design. They actually don’t bolt up to the older engines because the studs are in a different location (the older heads don’t have 4 stud spots)
The pipes flow smoother and it’s more than likely that this causes the newer cars to dyno slightly higher.

Do you have any pictures?

Jhill · 12-15-2018, 01:27 AM

So it sounds like the heads have an addition stud? So in theory one could mount the new ones and use the flange as a template to drill and tap their own holes and add studs?

Jhill · 12-15-2018, 06:13 PM

Quote:

Originally Posted by Jhill

So it sounds like the heads have an addition stud? So in theory one could mount the new ones and use the flange as a template to drill and tap their own holes and add studs?

Or other thought is the extra stud even needed? Haven’t heard of the old style being plagued by exhaust leaks before so not sure why they have another stud, maybe not even needed?

Pics of old vw new would be good if anyone has them, also pics of the supposedly better collector.

07-14-2018, 04:00 PM	#1 (permalink)
Jhill Track Member Join Date: Mar 2016 Location: San jose Posts: 854 Drives: 2013 370z sport Rep Power: 3384	2015+ exhaust manifold vs older So I just heard that the 2015+ exhaust manifolds are different than previous years. Anyone seen this or have pics?

07-14-2018, 05:03 PM	#2 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,185 Drives: 2011 Nismo GM 6M Rep Power: 2684437	Why would they change them. The Z hasn't changed in 10 years. LOL FPenvy, Hotrodz, RanRich and 2 others like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

12-07-2018, 01:33 PM	#5 (permalink)
husam2012 Track Member Join Date: Mar 2015 Location: Michigan Posts: 549 Drives: 370Z Nismo Rep Power: 9469	Just letting who might be searching for this in the future; the 2015s do have a better exhaust manifold design. They actually don’t bolt up to the older engines because the studs are in a different location (the older heads don’t have 4 stud spots) The pipes flow smoother and it’s more than likely that this causes the newer cars to dyno slightly higher. __________________ Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP) Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58) BTWTuning

12-07-2018, 02:03 PM	#6 (permalink)
OptionZero A True Z Fanatic Join Date: Apr 2011 Location: Sacramento Posts: 3,225 Drives: 15 370Z Nismo 6MT Rep Power: 214100	thats quite interesting, nissan actually snuck in improvements without sayin nothin? __________________ OptionZero Build Thread

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07-14-2018, 06:39 PM	#3 (permalink)
Jhill Track Member Join Date: Mar 2016 Location: San jose Posts: 854 Drives: 2013 370z sport Rep Power: 3384	That’s what I thought too but someone was saying the 2015+ have a different design at the collector (more like the z1 with a 3-1 with individual ports). Not sure if they are mistaken.

12-15-2018, 01:27 AM	#14 (permalink)
Jhill Track Member Join Date: Mar 2016 Location: San jose Posts: 854 Drives: 2013 370z sport Rep Power: 3384	So it sounds like the heads have an addition stud? So in theory one could mount the new ones and use the flange as a template to drill and tap their own holes and add studs?