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#1063459 - 09/05/19 07:55 PM Exhaust manifold DORMAN 674-653  
Joined: May 2016
Posts: 13
chriscris Offline
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chriscris  Offline
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Joined: May 2016
Posts: 13
Campbellville, Ontario
Would anyone know if there is a difference between aa '86 and '87 right side manifold?
I have an '87, and the DORMAN part say it only goes up to an '86.


DORMAN exhaust manifold 674-653

Thanks for any help

Chris


--
Chris
#1063471 - 09/06/19 02:25 PM Re: Exhaust manifold DORMAN 674-653 [Re: chriscris]  
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Posts: 1,765
88ss408 Offline
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88ss408  Offline
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Member

Joined: Aug 2007
Posts: 1,765
miramichi, NB
I am not sure. But I think they just list till 86 as they changed heads 83-86 has the 416 heads and 87-88 have the 081 but the manis should be the same.


1988 monte carlo ss 408 sbc
-----------------------------------------------------
1984 monte carlo cs 400 sbc
#1063496 - 09/09/19 12:51 AM Re: Exhaust manifold DORMAN 674-653 [Re: chriscris]  
Joined: May 2019
Posts: 51
T5montecarlo Offline
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T5montecarlo  Offline
Member

Joined: May 2019
Posts: 51
Lederach, PA
There is a different part number for the right exhaust manifold for 1987-1988 (14101054) than for 1983-1986 (14014500).
http://www.gmpartswiki.com/getpage?pageid=172790

The Y-pipe is the same, so they must have changed something when the valve cover design changed...very strange.

#1063497 - 09/09/19 01:08 AM Re: Exhaust manifold DORMAN 674-653 [Re: chriscris]  
Joined: Dec 1999
Posts: 11,526
86ttop Online grandpa
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86ttop  Online Grandpa
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Member

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Posts: 11,526
Brooksville, Fl
Marc, I think you hit the nail on the head, I recall someone doing an engine swap to a later engine in an 86 and he said the valve covers hit the exhaust manifolds, he did a bit if grinding at the contact points on the manifolds and all was well.


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