is this a jam manifold

[Nick85]

Right here we go the jam mani is on the right look at the thickess difference in the tubes more exspansion for the gas flow and the thicker ports...much thicker so no matter how much you port the stock it's never going to flow better, the guy probably thinks its a jam mani so he has taken it off ebay lol if anybody else says the jam mani is just a ported stock one more time am gunna kick off lol

I'm sure it's just ported

[Gainzy]

Stevie wonder could see the difference here Nick you mincer lol

[Addymk2]

That pic should be stickied lol

The cross section is different on all 3 of those pics though, the OP's and the Jam next to a standard one!

Ba Humbug.

[WallaceGlanza]

It's pretty clear from the 2nd photo that's a stock mani which has been ported - and roughly, around the collecter diameter, a casting wouldn't be finished like that.