Well, attempted to install the JB4 yesterday. Got it all mounted up, but got stuck trying to disconnect the MAP sensor on the front intercooler. The instructions call for removing the bumper, but I was hoping to avoid doing that as I didn't want to crack it (there's a bumper crack TSB and my car is no longer covered under the basic warranty). Instead I tried to go through the small space in the lower grill. I can see and reach the sensor, but no matter what I tried, I couldn't get it unplugged. There isn't enough space to get anything except my hand in there, and I can't see how the sensor comes out, so I gave up for now. But here's a pic of how I have it mounted.
View attachment 311410
A note - For the CX-9, the MAP connection wire could benefit from being an extra 12-18 inches longer for a cleaner install. I wanted to run the wire underneath the intake piping and across the engine, ziptying the wire harness to the existing engine harness under the engine cover. But if I do it that way, the MAP sensor wire is too short to reach the connector. Instead, I have to run the wire between the front of the engine and the fan, and it kind of just hangs there and looks sloppy. Maybe I'll look at different mounting places for the box.