[Fendamonky]

I had both my UIM and LIM ceramic (and teflon) coated when I had them extrude honed.

I honestly don't have any specific comparisons to say whether it's colder or not since I had it done when I got a rebuild, and swapped from twins to a single.

That being said, I have noticed that the UIM typically feels much cooler to the touch after I stop.

I think there are a lot of factors that go into this though... I've also got ceramic coating on my turbo/DP, I have Turblown's inconel heat shield for the LIM, I'm spraying water/meth starting progressively from a lower boost, etc., etc.


I'd say that if you ONLY ceramic coated your LIM/UIM than it probably wouldn't really make that much of a difference, as heat would be seeping in from other areas. However if you do it in part with other precautions you'll def probably notice it's effectiveness.