Oem exhaust manifold

Z_ealot · 10-05-2016, 06:13 PM

Searched for it on here, but couldnt find it....but does anyone know what material the oem exhaust manifolds are made out of?

Chan Chee Hoe · 10-05-2016, 07:10 PM

Should be Cast Iron.

ChopsZ · 10-05-2016, 08:14 PM

They're not cast iron. They are not your typical "exhaust manifold" like an old Chevy small block. The 370Z uses a tubular manifold, actually a header. It's either steel or stainless steel. And I think it's an equal length design.

Z_ealot · 10-05-2016, 08:47 PM

Ok thats what i was wondering cause ive had several different people tell me they're cast iron, but when i had one of them off the other day the metal is shiny like stainless with a little bit of rust build up on some of the surfaces. I always thought cast iron had a rough finish to it even when new. Anybody can confirm?

mountaineerz · 10-05-2016, 08:59 PM

Those pictured do not look like equal length headers.

If I'm wrong it won't be the first time though.

These are equal length ...

http://i139.photobucket.com/albums/q...ZSSHEADERS.jpg

Z_ealot · 10-05-2016, 09:12 PM

Quote:

Originally Posted by mountaineerz

Those pictured do not look like equal length headers.

If I'm wrong it won't be the first time though.

These are equal length ...

http://i139.photobucket.com/albums/q...ZSSHEADERS.jpg

Ok so what are the stock manifolds made out of?

ChopsZ · 10-06-2016, 08:10 AM

AGAIN... They are either steel or stainless. It's pretty darn obvious.

gomer_110 · 10-06-2016, 08:59 AM

Generally speaking you can tell stainless from non stainless by using a magnet. Yes there are exceptions, but high grade stainless steels are generally not magnetic.

SouthArk370Z · 10-06-2016, 09:19 AM

Quote:

Originally Posted by Z_ealot

... I always thought cast iron had a rough finish to it even when new. Anybody can confirm?

Confirmed (cast iron is often cast in sand molds). And, because of it's brittleness, will be much thicker than the stainless ("regular" steel would oxidize - see the flanges) tubes of the Z manifold.

Z_ealot · 10-06-2016, 10:36 AM

Thanks everyone for the responses, just had a lot of people telling me they were cast iron cause i had to have an o2 bung welded back on after it broke off while trying to change a bad o2 sensor and everyone was saying to get another manifold cause the weld wouldnt hold cause "the manifolds are cast iron"

SouthArk370Z · 10-06-2016, 10:45 AM

Quote:

Originally Posted by Z_ealot

Thanks everyone for the responses, just had a lot of people telling me they were cast iron cause i had to have an o2 bung welded back on after it broke off while trying to change a bad o2 sensor and everyone was saying to get another manifold cause the weld wouldnt hold cause "the manifolds are cast iron"

With cast iron, brazing works well in most applications. Cast iron is difficult (but not impossible) to weld.

mountaineerz · 10-07-2016, 09:25 AM

Quote:

Originally Posted by Z_ealot

Ok so what are the stock manifolds made out of?

Not cast.

Here is an example of cast manifolds for the Z

10-05-2016, 06:13 PM	#1 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	Oem exhaust manifold Searched for it on here, but couldnt find it....but does anyone know what material the oem exhaust manifolds are made out of?

10-05-2016, 08:14 PM	#3 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 49 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2301	They're not cast iron. They are not your typical "exhaust manifold" like an old Chevy small block. The 370Z uses a tubular manifold, actually a header. It's either steel or stainless steel. And I think it's an equal length design. Z_ealot likes this. __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity

10-05-2016, 08:59 PM	#5 (permalink)
mountaineerz Base Member Join Date: Aug 2016 Location: West Viriginia Posts: 7 Drives: 14 Black-Sport-6sp Rep Power: 9	Those pictured do not look like equal length headers. If I'm wrong it won't be the first time though. These are equal length ... http://i139.photobucket.com/albums/q...ZSSHEADERS.jpg __________________ 14 370 sport test pipes Last edited by mountaineerz; 10-05-2016 at 09:03 PM.

10-06-2016, 08:10 AM	#7 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 49 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2301	AGAIN... They are either steel or stainless. It's pretty darn obvious. Z_ealot likes this. __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity

10-06-2016, 08:59 AM	#8 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36941	Generally speaking you can tell stainless from non stainless by using a magnet. Yes there are exceptions, but high grade stainless steels are generally not magnetic. Z_ealot and SouthArk370Z like this. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

10-05-2016, 07:10 PM	#2 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	Should be Cast Iron.

10-05-2016, 08:47 PM	#4 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	Ok thats what i was wondering cause ive had several different people tell me they're cast iron, but when i had one of them off the other day the metal is shiny like stainless with a little bit of rust build up on some of the surfaces. I always thought cast iron had a rough finish to it even when new. Anybody can confirm?

10-06-2016, 10:36 AM	#10 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	Thanks everyone for the responses, just had a lot of people telling me they were cast iron cause i had to have an o2 bung welded back on after it broke off while trying to change a bad o2 sensor and everyone was saying to get another manifold cause the weld wouldnt hold cause "the manifolds are cast iron"

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