I decided to pull the stock exhaust manifolds off of the 5.7 in one of my 2004 Ram 1500 QCSB. They have been warped for years and just recently started leaking. I took some measurements and the left side had a .016" difference between the #1 port and the #7 port.
The right side had a difference of .014" between the #2 port and the #8 port.
I ran them on the mill and the belt sander to straighten them out and put them back on with a set of Percy's gaskets from my local Summit Racing in Arlington, TX.
I went ahead and gasket matched them to the Percy's gaskets. Might as well while I had the time.
View attachment 185833 View attachment 185834