Jeep 4.0 in 69 Barracuda

I am assuming that 273 is a carburated engine which doesn't care as much about exhuast back pressure. But if you look at stock jeeps with 4.0's, they have a 2.25 from the manifold to the cat, 2.5 inch pipe from cat to muffler, and 2.25 pipe tail pipe. Keep in mind I plan on keeping the Jeep Stock fuel injection.

So going full 2.5 exhaust from head to tail, thats a upgrade. And thats what alot of manufactures are selling for Jeeps. And if I go dual 1.75, thats about the same as a single 2.5 inch exhaust as I expressed in my prior post on page 2.

At this point, its all up in the air as I need to sort out the dual exhaust manifolds and O2 sensors. Cause I may be stuck going single manifold and dual tail pipes.

John