For the oil, I added the pan spacer to hold an extra quart. This is what the HD engineers told me they did with the Destroyers. I also put on a heat sink, there is a post on it on the Forum. Cost about $15 & had it cut in half, sold the other half for $10. I believe it helps. I just did a post about heat shields you might want to read. The intercooler is not cost effective at the boost we run. Get a good dyno tune first, the Trask map is WAY soft. After that the heads & cam are good for 20 hp together across the rpm range. Have you upgraded fuel pump & injectors ? If not it should be a priority. I have the big 8.75 Seimens units, no issues at all running them.