Throttle Body Spacers. POS or Worth It?

POS. Have them on the V6 just for fun and I was bored. Got them for free and didn't notice much or anything at all. Maybe a slight difference in gas mileage but that's all.
 
but what about plenum spacers?
http://cgi.ebay.com/ebaymotors/Holl...ustang-GT_W0QQitemZ140195893935QQcmdZViewItem

Carb spacers have always been worth a few ponies. Mainly due to the additional plenum volume. Every little bit helps

firstly you dont want to go too tall, just the TB+Plenum alone wouldnt fit under my strut tower brace. Next volume isn't really an issue when you cant exceed the flow 75mm will grant in the first place
I guess if you're pushing a good amount of boost this could help