I purchased the IPP CAI a few months ago. I was pretty excited to get it installed, as it was my first upgrade I did to the car. I had a few issues with the install that really bummed me out, I will try to explain some of the issues.
When I got the kit, it was supposed to come with 2 hoses. One hose was an upgraded coolant line, and the other hose was a valve cover breater hose, that connected to the intake. I only received the upgraded valve cover breathing hose, which is not your typical coolant / fuel hose. It was simply a light-weight rubber hose, with no reinforcement inside it. Unfortunately, that is the hose that I used as the upgraded coolant line. This was the only line in the box, so I assumed that this was the one that I needed to use. I used the stock breather line from the valve cover on the CAI and it seemed like this is what I was supposed to use. A couple days later, I had sprung a leak in the “upgraded” coolant line, and coolant was spraying into the engine bay. I guess I wasn’t too surprised when it happened, as I had thought that when I installed the “upgraded” coolant line, it was not going to take pressure and rubbing too well.
I drove to the parts store and got some regular coolant / fuel line to replace the hose that had the hole. I went ahead and removed the battery and the CAI from the turbo housing. In doing this, I noticed that there was a little rubbing happening between the end of the CAI and the turbo itself. It kind of worried me that some metal particles could get into the turbo. I went ahead and replaced the line, and when installing the CAI back onto the turbo, I did my best to position it so that rubbing of the CAI on the turbo would be kept to a minimum.
Fast forward a couple months, I start to smell a bit of a coolant smell when I turn on my AC, I pop the hood and check out the upgraded coolant line that was near the CAI. Come to find out the CAI was a tight enough fit that it had rubbed through the coolant line and had now sprung another leak. This was about the time when this issued had came up on the boards and Hector or Ray had suggested to bend the nipple that was coming off of the main coolant line to avoid rubbing, so I did this, and it seems to have solved that problem for good. I replaced the line again, and have been keeping an eye on it, so far so good.
Another issue I had with the install of the IPP CAI, was when I was installing the bolt with the rubber “shock absorber” to help support the CAI near the battery tray. I tried threading the bolt down into the battery tray, and it was going in pretty hard. The instructions had stated that it might be hard, but to keep going at it. I double and triple checked to see if I had cross threaded the bolt, yet after a few attempts, I ended of twisting the bolt off in the hole. I am wondering if it might have been a difference between and ’03 and ’04 models battery tray. I have an ’04. I was able to drill out the hole, and flip the bolt/shock absorber over and turn it in a little ways to use it.
I am not sure what to think about the heat soak issue, or how my IPP CAI gets so freaking hot. I am sure that part of it is living in Arizona with 100+ degree temperatures and the fact that the CAI actually touches the turbo, but after the car gets up to temperature the CAI is hot to the touch, and after some spirited driving I am unable to keep my hand on it without burning myself. I know that air is running through the intake at a pretty high rate of speed, so I am not sure if the air really has that much time to heat up.
I just wanted to post my experiences with this, I hope this is what you were looking for. I have had a few setbacks with the intake, but I like the way it looks, and how it doesn’t come up over the battery.