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10-12-2013, 02:44 PM | #1 |
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Join Date: Feb 2003
Location: Mulvane, Ks.
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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 |
72 BB C30 Super LongHorn
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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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
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10-12-2013, 07:15 PM | #3 |
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Location: Beaverton, OR from WA State
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Re: 454 exhaust manifolds
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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 |
Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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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 |
Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: 454 exhaust manifolds
Why not get new headers and not lose the power?
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-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 |
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Join Date: Dec 2011
Location: Creighton Sask. Canada
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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.
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1987 Green n Green machine. 5.0 4spd std. 7" lift w 35's. |
10-12-2013, 08:57 PM | #7 |
Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: 454 exhaust manifolds
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10-12-2013, 10:35 PM | #8 | |
72 BB C30 Super LongHorn
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Re: 454 exhaust manifolds
Quote:
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.
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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 |
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10-12-2013, 10:48 PM | #9 | |
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Location: washington
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Re: 454 exhaust manifolds
Quote:
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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10-12-2013, 10:55 PM | #10 |
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Join Date: Feb 2003
Location: Mulvane, Ks.
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Re: 454 exhaust manifolds
Thanks for the input, guys. I really appreciate it.
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10-12-2013, 11:47 PM | #11 |
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Join Date: Oct 2013
Location: Winfield KS
Posts: 489
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Re: 454 exhaust manifolds
I just found a crack on my 454 passenger side exhaust manifold today :-(
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10-13-2013, 10:46 PM | #12 |
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Join Date: Dec 2006
Location: North Carolina
Posts: 308
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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
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1985 1500 454, 4l80e, 12 bolt, 5/6 drop, 20s |
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