Posted By: chriscris
Exhaust manifold DORMAN 674-653 - 09/05/19 07:55 PM
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
Posted By: 88ss408
Re: Exhaust manifold DORMAN 674-653 - 09/06/19 02:25 PM
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.
Posted By: T5montecarlo
Re: Exhaust manifold DORMAN 674-653 - 09/09/19 12:51 AM
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.
Posted By: 86ttop
Re: Exhaust manifold DORMAN 674-653 - 09/09/19 01:08 AM
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.