I guess increases the runner length by lots....

and it may as well adapt to the stocky manifold, like others putting Webers DD with adapter to stocky manifolds with good results,

not ideal but interesting..

Bit like the Filter adapter I Have, most filters dont have enuff space to fit trumpets, this adapter acts as tumpet, and gives space for a bigger filter, or even poke it out the bonnet.. (not with the crappy filter it came with of course... )