st170 manifolds dont fit other zetecs like people say on the net the port postions are way off trust me i know and manifold header parts fetch a packet as i think people are buying them up for itb conversions thinking thay bolt stright up
the rest of the manifold is big and may not fit under the hood of some kits
then there is the odd fuel way the fuel pressure is regulated eletronicly, veriable intake tracts and you will still need to remap to suit exhaust changes
my 10p on st170 all seems too much of a headache for me
im going to make a alloy version of mine later down the line
i am intersted in the st170's knock sensors info for my megasquirt system tho