The ATP one looks good but the two end ports face eachothr and may not work aswell as if there was a deflector in there.
To answer the queton i recon up to 250BHP you should be ok.
i suppose so, I've just remembered there are people running ko4 hybrids on standard mamis

i suppose so, I've just remembered there are people running ko4 hybrids on standard mamis
ahhhhhhh
i wasnt aware of anyone running one with a stock manifold though?
Dave got an ATP, who ever bought martyns friends with am04 has the a&m one too i think?