Plenum spacer kit?
 

This is obviously an easy and cheap mod to gain a little power, who else has done this to their G and was it worth it?
Thanks,
-Ian

Pretty much everyone, best bang for your buck mod on this engine. If you have the rev-up engine you will also need the MREV2 lower plenum.

Closing this thread since it's been covered many thousands of times and there's nothing left to add to the discussion.