Down pipes to fit stock BB manifolds

[ZEKE68]

Does anyone know where to get exhaust pipes to go from the stock big block exhaust manifolds down and back to the straight runs back. I have looked at every supplier and talked to the parts houses and can only find small block systems or header back systems. Is everyone who runs stock manifolds on a big block making up their own down pipes?

[kwmech]

I went through the same deal a couple months back getting ready to fire up my new engine. Wanted to have some length of tube instead of out of the manifold directly. Ended up at the muffler shop to have it made. Even had a hard time finding the correct flange to have the tube go through so I could bolt it up

[randy500]

Pypes DGU20S
Right side is a sure fit, left might require some modification near the manifold.
These are for a car so I think they would run over the transmission crossmember.