Hello was wondering if the 1.6l flywheel is has a larger disk surface on a 4 door then a 2 door going to start my build this spring and need to upgrade my clutch. Thanks

It isn't necessarily a "2 door", "4 door" thing.  It is an "8V, "16V" thing.  Trackicks with the 8V use a 7.9" diameter disc.  Trackicks with the 16V use an 8.5" diameter disc.  The flywheels are the same for both the 8V and 16V, so all you have to do is buy the bigger clutch and it will bolt on and work perfectly.