There was a group buy many moons, it was a really thick gasket made from a white material, it did reduce temps, but I'm not sure by how much. TBH the gains on our low level bhp don't really make it that worthwhile, nor do we have an extreme hot climate. Other problem is inlets are at the front so you will always get warm air from the rad/air con blowing over.
If you are bored and got spare cash to throw around get it, otherwise I wouldn't bother
