Got a set of these headers with a motor I bought (for a boat I’m doing) and have no clue what to do with them and no I’m not going to build a monster truck for them.
They are off a BBC 454 and are truly made upside down (the spark plug cutouts are on the bottom side). Any ideas who would have a use for them?

A vehicle?

Generally upside down headers are pretty exclusively a mudder application. As I'm sure you know, they go up through the hood. They actually are worth a few $$$ to the right person.

post them on pirate4x4.com

Commonly called "Zoomies"

Mud trucks, crawlers/rock climbers, and demo derby cars use them. I have a couple sets of SBF sets for my derby cars. I've seen them with mufflers and flappers on them, which could be what the flange is for. Some of the race boats run them and are called "Tractor Pipes" on the boats usually.

You can probably sell them on eBay. That's where I've bought mine.

Drag cars?

Thanks folks.
I need to start selling some stuff on eBay instead of buying.

Pretty sure those were just mounted upside down, those would aim right through the firewall or cowl an look just like hookers for a 3/4 ton pickup

mark, im sure you could make them work put some turbos on the end of them and weld some sheet metal around the outsides and run water through them

You have to look at the picture again. The cutouts on the exhaust flanges for the spark plugs are on the wrong side. One of the first things I did was flip them over see if they would bolt up but the spark plugs were in the way.

Fixx, Not on my boat. lol