There was a much larger response to these for the supercharged motor back when LET released them for roughly the same price because ( imo ) there had already been lots of info showing how the spacers help keep temps down and power up. On the other hand, this thread seems to lack some information about how this could really be helpful and no one really has the data / info to show that they would be beneficial at all... The "keeping IATs as cool as possible" line basically sold it for me, but alotta peeps are looking for numbers.

Either that or everyone is out enjoying the summer and just driving their cars around and not forum whoring enough.