Plenum

I purchased the GBS Plenum, it replaces the stock intake manifold and its a great piece of kit.  It also seems like a have version 2.0 - the addition of a hose connector.  This one baffled me for a while but it looks like I have two options.

Option 1 - bung the hole and adjust the throttle screw to get the idle correct.  This is what I had originally intended on doing, admittedly because I didn't understand what an IACV was.

Option 2 - connect up a remote IACV.  Now that I know what it does (and that GBS sell a mounting bracket) I am going to chose this option.  The Emerald ECU has instructions on how to setup the IACV when its required and I am looking forward to that challenge; if I can't do it I will be able to find someone who can.

The Plenum is very well made and comes powder coated.  The original manifold needs to be cut down and this is a service that GBS do and I would recommend it as it needs to be done correctly:

There is also a threaded hole which accepts the air temperature sensor - top tip from me (common sense now...) clean the thread out *before* fitting the Plenum to the car!

I wasted around an hour of absolute faffing around trying to fit the sensor and it was impossible whilst on the car.   I actually ended up cleaning the thread out after checking the sensor size and thread pitch on the emerald site (M12 1.5 BTW):

Once the thread was cleaned up the sensor went in fine, throttle body attached to the car and we are done:

The fuel rail will be sorted later on, its simply resting to seal the holes up.   Looking very much like an engine now: