looking for advice on an uprated inlet manifold for better air intake, just wondering if it is possible to aquire one for an st170, i am also looking for a stainless 4-2-1 exhaust manifold to, i know they already have one standard but i would like a bigger one and stainless if anyone has any ideas.

if your gonna slag then please don't message as i'm just looking for advice.
thanks guys

Darren