Rigid exhaust?

[Grendel]

Then the exh needs to be loosely mounted.

Flex coupler between the motor and the first mount then 2 or 3 hangers

He has it right.

it needs to be loosely mounted / flex piped if/where it transitions from the engine to the chassis/body. so there's enough give when the engine moves around.

 

[Austin]

He has it right.

it needs to be loosely mounted / flex piped if/where it transitions from the engine to the chassis/body. so there's enough give when the engine moves around.

I made a rigid exhaust that hangs off the drivetrain and will add a flex joint near the crossmember and add the rest of the exhaust to the frame after the flex joint

 

[mobil1syn]

exhaust was solid mounted to the drivetrain, flex joint and then solid mounted. this picture was after i went to a dump and ditched the rest of the exhaust

 

[arse_sidewards]

exhaust was solid mounted to the drivetrain, flex joint and then solid mounted. this picture was after i went to a dump and ditched the rest of the exhaust

I did exactly that on my old F150. You can just barely cram a pair of turbo mufflers in where the cats used to go if you give one of them a good dent with the BFH. I didn't do any flex joint. Hard mount at the manifold, hard mount at the t-case and then only a couple feet of unsupported pipe to get from there out the side just behind the cab corner.

Worked great for as long as I had it. I'd do it again with better fit and finish.