47-55.1 LS Swap Muffler Kits for AD Trucks

[R&B51]

JDarby
From looking at images online of the C4 suspension and muffler routing, it looks like they take them right underneath the differential in the center and you can run them out the back however you want. Were you going to locate your gas tank behind that rear assembly?
If not, that may be a way to get them out the rear end.
Those Corvettes had a lot shorter wheels and tires than your truck should have especially if you’re using larger rims. That will raise the bottom of that differential even farther off the road and give you more ground clearance between mufflers and pavement.
If it helps to save you space up ahead, you might check out the muffler from Borla:
BORLA 400286 ProXS Universal Performance Muffler
I looked a long time and purchased that one for mine. It will be located right under the front of the bed in the center. It has two inlet, two outlet and a built-in X pipe in the middle. It is pretty much a flow through muffler, but if you read the reviews, people seem to really like it. some of them even complained it was a little bit too quiet for them, but got them a nice rowdy sound when they jump on it. No drone.
I have not started mine yet, but I like the way it looks, guaranteed for life, American made. Since it’s only one muffler for both exhaust pipes, the cost to me is very reasonable for all you get. I’m excited to hear it run.
Don’t know if this input will help you but wishing you good luck.