454 exhaust manifolds - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**oldwagon** · 10-12-2013, 02:44 PM

I'm in a quandary because I'm not sure what I'm looking for. My 83, 1 ton, 4speed, 4x4 has a 454bblk. Headers are on the truck now and were when I bought it. They are starting to rust through and I want to replace them with the original manifolds if I can find a set. Any pics or numbers?

Thanks.

**RPOZ11** · 10-12-2013, 03:39 PM

Probably an 8 digit part number.
There are several styles.
These crack so check out what you are looking at before you buy

83GMCK2500 · 10-12-2013, 07:15 PM

Originals were likely:
LH - 14057190
RH - 14048362

Got them, here.

Tx Firefighter · 10-12-2013, 07:36 PM

I bought new Dorman band manifolds for my big block from Rockauto. Somewhere around 160 for the pair. Very good quality. Much more substantial than the original ones were and hopefully, less likely to crack. They aren't USA made, but there aren't any options that I could find otherwise.

Both of my originals had been cracked and welded some time during the past.

willett · 10-12-2013, 08:51 PM

Why not get new headers and not lose the power?

mud.man.rj · 10-12-2013, 08:54 PM

If you lose the headers then will cost a bit more as will need new pipe up to both manifolds, so some shop work there, plus headers sound sooo much better and of course the power loss as mentioned.

Tx Firefighter · 10-12-2013, 08:57 PM

Quote:

Originally Posted by willett

Why not get new headers and not lose the power?

Manifolds are quieter, don't leak as easy, and don't interfere with plug wires.

**RPOZ11** · 10-12-2013, 10:35 PM

Quote:

Originally Posted by Tx Firefighter

Manifolds are quieter, don't leak as easy, and don't interfere with plug wires.

X2
These are 3 reasons why I use them.

Plus, more room to work with in the engine bay.
I still have a set of Thorleys.
I want to use them, but have yet to commit to them
One of my issues with headers is getting a long term ability to stay secured to the heads without having to constantly retighten them all of the time.
Maybe one day I will discover a cure for this.

INSIDIOUS '86 · 10-12-2013, 10:48 PM

Quote:

Originally Posted by RPOZ11

X2
These are 3 reasons why I use them.

Plus, more room to work with in the engine bay.
I still have a set of Thorleys.
I want to use them, but have yet to commit to them
One of my issues with headers is getting a long term ability to stay secured to the heads without having to constantly retighten them all of the time.
Maybe one day I will discover a cure for this.

Header lock washers. Rtv the threads and remflex gaskets big the leak you either cut them or smashed your truck. Otherwise cut them up send them to me and I will put them in my hat and eat them.

if you really want to make sure...safety wire. Headers are louder cause they are thinner and flow more. Quality headers help with any issues too.

**oldwagon** · 10-12-2013, 10:55 PM

Thanks for the input, guys. I really appreciate it.

INSIDIOUS '86 · 10-12-2013, 11:18 PM

Quote:

Originally Posted by oldwagon

Thanks for the input, guys. I really appreciate it.

I would get those aftermarket manifolds if you really want manifolds. Factory ones crack always.

Chevy3+3 · 10-12-2013, 11:47 PM

I just found a crack on my 454 passenger side exhaust manifold today :-(

Rascal_one2001 · 10-13-2013, 10:46 PM

These are a bit pricey but they seem to be the best of both world header flow cast looks and just something different

http://www.sandersonheaders.com/Sand...eader-Set.html

10-12-2013, 02:44 PM	#1
oldwagon Registered User Join Date: Feb 2003 Location: Mulvane, Ks. Posts: 754	454 exhaust manifolds I'm in a quandary because I'm not sure what I'm looking for. My 83, 1 ton, 4speed, 4x4 has a 454bblk. Headers are on the truck now and were when I bought it. They are starting to rust through and I want to replace them with the original manifolds if I can find a set. Any pics or numbers? Thanks.

10-12-2013, 03:39 PM	#2
RPOZ11 72 BB C30 Super LongHorn Join Date: Nov 2002 Location: Chavez Ravine Posts: 1,606	Re: 454 exhaust manifolds Probably an 8 digit part number. There are several styles. These crack so check out what you are looking at before you buy __________________ 72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS

10-12-2013, 07:15 PM	#3
83GMCK2500 Registered User Join Date: Sep 2009 Location: Beaverton, OR from WA State Posts: 1,515	Re: 454 exhaust manifolds Originals were likely: LH - 14057190 RH - 14048362 Got them, here. __________________ Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96

10-12-2013, 07:36 PM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 454 exhaust manifolds I bought new Dorman band manifolds for my big block from Rockauto. Somewhere around 160 for the pair. Very good quality. Much more substantial than the original ones were and hopefully, less likely to crack. They aren't USA made, but there aren't any options that I could find otherwise. Both of my originals had been cracked and welded some time during the past.

10-12-2013, 08:51 PM	#5
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: 454 exhaust manifolds Why not get new headers and not lose the power? __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

10-12-2013, 08:54 PM	#6
mud.man.rj Registered User Join Date: Dec 2011 Location: Creighton Sask. Canada Posts: 4,121	Re: 454 exhaust manifolds If you lose the headers then will cost a bit more as will need new pipe up to both manifolds, so some shop work there, plus headers sound sooo much better and of course the power loss as mentioned. __________________ 1987 Green n Green machine. 5.0 4spd std. 7" lift w 35's.

10-12-2013, 10:55 PM	#10
oldwagon Registered User Join Date: Feb 2003 Location: Mulvane, Ks. Posts: 754	Re: 454 exhaust manifolds Thanks for the input, guys. I really appreciate it.

10-12-2013, 11:47 PM	#12
Chevy3+3 Registered User Join Date: Oct 2013 Location: Winfield KS Posts: 489	Re: 454 exhaust manifolds I just found a crack on my 454 passenger side exhaust manifold today :-(

10-13-2013, 10:46 PM	#13
Rascal_one2001 Registered User Join Date: Dec 2006 Location: North Carolina Posts: 308	Re: 454 exhaust manifolds These are a bit pricey but they seem to be the best of both world header flow cast looks and just something different http://www.sandersonheaders.com/Sand...eader-Set.html __________________ 1985 1500 454, 4l80e, 12 bolt, 5/6 drop, 20s



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