Jeep exhaust Manifolds instead of headers, are these the large opening manifolds?

I searched the site looking for the answer as I know I read it a long time ago but couldn't find. I am wanting to run manifolds instead of headers for a modified 318 (less than 400hp) for a mostly street car. I didn't want to lose low end power or deal with any header issues. My friend grabbed a pair of Jeep manifolds, part numbers: 53008378 and 53009377. I wanted to confirm that those are the manifolds that have the larger diameter (like the Dakota RT) than the ones on the trucks and cars. Thanks