Merc I6 - 2 into 1 Exhaust Stack

[RogerH]

Hoping someone can give me some history and explain some details about this Merc inline-6 exhaust system. I bought a "display" motor that was assembled for a museum in Rome NY. Was from Dave Packer's items. The exhaust is just "sitting" in the covers as pictured below.
Who made these exhausts? Mercury Racing?
How was the exhaust interfaced to the block? Fillerblock & manifold?

Would like to see if I can fab items to make this functional again. Thanks for any help with this!!!
Regards, Roger

[largecar91]

Hey Roger, I have this picture of an early C6 with Morgans had the same exhaust. Hope this helps a little. Barry

[largecar91]

I have it in my notes this was a Checkmate Tunnel. I found another picture showing Mike Downard racing a single stack C6 at Parker in 71. Maybe Mike or Gordon Downard could shed some light

[RogerH]

Thanks Barry, Looks like I have a tough thing to find or make. I had this picture too, just didn't think of it. Hey! join us in Springfield Ohio. Vintage OPC boats will be there with the NGK series guys August 10-12th

[RogerH]

I was told there was a thread or post on S&F that showed the internals of this exhaust system. I don't know what to search on - can anyone help locating this?

[JAFFA]

If you can get hold of a Twister 1 exhaust internal plate you should be able to work something out

[FMP]

Someone posted a few pics of the cover with pipe, where did they go, wrong thread?
What's the fire order on that inline , divided two triples by the looks of the cover?

[JAFFA]

Someone posted a few pics of the cover with pipe, where did they go, wrong thread?
What's the fire order on that inline , divided two triples by the looks of the cover?

Heres some stuff but its the three pipe setup
https://www.screamandfly.com/showthr...ighlight=JAFFA

[FMP]

That's a good read, Fuji posted some pics on his thread.