Exhaust manifold swap

[menace2sobriety]

My question is: can I use the '00-'01 factory 4.0l two piece exhaust manifolds on my stock '89 in place of my factory one piece manifold? No pesky emissions hooplah in my state, and willing to run dual exhaust. Will this work?

[Crash]

I would just run a dorman or 1aauto ho manifold. Should only be around 100.

[HOrnbrod]

It's been done, but the 00 and up exhaust manifold ports are smaller, so you would have to do some porting to match the Renix head for the best flow. Too much work for too little gain IMO.