Thanks, I'll post what I find. Im using a 4.8 out of a 2008 siliverdo btw. I like the idea of crome or stainless steel, but I've read the ceramic coated ones will reduce temps.
The center dumps look cool but I can't find anyone that has put them in a TJ? and they look like they are pointed square at the motor mount.?
Im actually going to try to set the engine wth the stock manifolds just to see whats up and how bad they hit. Even though eveyone says it will not work with stock. Most say they will hit the firewall, IDK we will see.