2015+ exhaust manifold vs older

husam2012 · 12-07-2018, 12:33 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.

Rusty · 12-07-2018, 01:26 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, 01:29 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, 01:47 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.

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Rusty · 12-07-2018, 02:58 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.

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

husam2012 · 12-07-2018, 03:09 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.

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Justint5387 · 12-07-2018, 04:39 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, 12:27 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, 05:13 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.

12-07-2018, 12:33 PM	#1 (permalink)
husam2012 Track Member Join Date: Mar 2015 Location: Michigan Posts: 553 Drives: 370Z Nismo Rep Power: 9471	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

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12-15-2018, 12:27 AM	#8 (permalink)
Jhill Track Member Join Date: Mar 2016 Location: San jose Posts: 855 Drives: 2013 370z sport Rep Power: 3386	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?