I picked this up at my local speed shop. Its for rectangle port big block chevy. It also will accept a LT1/TPI type thortttle body, and has place for GM map sensor to bolt ot side of it. These use a GM TBI-700 side feed type fuel injector with 6 small holes in the botttom.

Other then that I don't have a clue what this came from. I'm sure it was marine.

 

Did you ever figure out what that intake was? Did you ever end up using it? Im very curious about it, looks to be a Ramjet 502 prototype. I know this is a very old thread but hopefully the OP is still on here.

 

No never for certain what it is from exactly. I've talked to many over the years and what I understand gm wanted to ventured into marine performance world and maybe decided not to try to compete with Mercury Marine (which was using their engines already. So best guess it was some sort of marine prototype intake from GM. I still have the intake.

-Brendan

 

Would you be interested in selling it? Im trying to put together a BBC intake manifold shootout for Marine-based engines with wet exhaust. I want to test the Accel Stealth and Accel Super Ram and modified Mercruiser MPI intakes and the Edelbrock PRO Flo. The only problem I see with that one is the fuel rail and injector setup. How much does that thong weigh?

 

I think I'll hold on to it...it doesn't eat anything and would never replace it... Thanks for the interest.