I don't speak about fluid dynamics in that manifold...
:eek:
it's too slim to have that square form.before you start selling these you shoulf check INDIVIDUAL AFR IN CYLINDERSVIA 4 WIDEBAND SENSORS IN THE HEADER.then you'll see.
dasc manifold is not this slim and it's not square inside. Ever heard about vortex?
example, your is a lot more poor than this...:

I bet you have to work a lot to obtain a ready to sell product and optimize some things....
nothing against you, want to save you the hassle of customers screaming for blowing engines.
If you check there is space for intercooled version, don't ask, I know
