I5 engine q's

[alan pritchard]

i was hunting around scrapyards today for Fuel injection bits for my cgt,  i
noticed on a lot of the 100 estates that their intake manifolds go over the
top of the engine and are split in two,  the fuel injection kit looks the
same as are all the ancillary bits, whats the point of this manifold, and
would there be any gains for me to fit it to my cgt????