Cylinder head exhaust ports.

[SF87K5]

I have a 90 5.7 tbi I am going to put headers on friday. I need to know what kind of exhaust ports are on them. Are them the round ones or the square ports?

It is my DD so I cant just take my exhaust manifolds off. I need to know cuz I am getting the headers friday and they have both types. So can anyone help, pics would be nice also if you can thank. /forums/images/graemlins/thumb.gif

 

[SUBFAN]

More like a laying down "D"....Either will prolly do, both of my sets have had a round port....

 

[bigburban383]

I got a 90' 5.7 block on a burban and the ports on it are square, well a square with rounded corners.

 

[84_Chevy_K10]

I always use the round port header gaskets.

 

[bigblock44k5]

D-shaped, Get rounds....