View Full Version : Exhaust manifold porting

01-05-2011, 03:32 AM
First here is a pic of an extra set of manifolds we were going to have ported. Need to make sure they are the right ones for a 93. I seem to remember something about a slight change or difference in model years. Second I need a couple good pics of the finished ported end and the exact measurement. I have someone to do this for me locally and just need specs.


p.s. id you have any tips, hints or potential problem areas, I would love to hear them

01-05-2011, 08:01 AM
All driver side exhaust manifolds are the same from 89-95 but the 94/95 passenger side exhaust manifolds are different than the the 89-93, they exit at a different angle making them not compatable with the exhaust downtube on that side.

01-05-2011, 10:13 AM
There really isn't a mythical number to hit....

I just remove the restriction, making sure that there are no high spots.....

The finished opening usually runs somewhere around 1.750 to 1.800 in diameter....

The main thing you need to be aware of is to remove as little material as possible from the spherical sealing surface....