So, I installed the CAI I got last week today. Taking off the old air filter assembly was fairly easy. The tricky part came trying to piece the CAI together. In itself, it is not a hard install. The problem I ran into was poor build quality IMO. I came across two instances of this that were a realpain the ass.
#1 After you install the air filter housing (Big box air filter sits in) you have to install the filter adapter. basically all this is is a piece of tube that connects the filter housing to the intake tube. There are 3 holes in the filter housing and 5 threaded holes on the filter adapter. Put the adapter inside the housing and screw it down. Right easy? Well, it would be that the holes that were predilled into the housing didn't match up to any of the 5 threaded holes. I then had to take the housing out again and match up 2 holes and 1 that was the closest and kinda chew away at the hole with a a drill bit to open it up a bit. After that, that went easy. Trying to put the screws in before making this adustment results in dropping 3 screws into the engine bay and 1 was never recovered, Went all the way done.
#2 After the CAI was in, you put on that TRD silver cover. Cool looking cover. Well, the air filter housing is not the exact size as the cover. It took me putting in 1 screw and then pushing/pulling on the housing to line up another etc etc. The last screw I don't know how it would have ever lined up. But seeing that I never found that screw (they are the same for #1 PITA above) I had to just leave it. it is the screw all the way inthe back on the left.
Just some observations:
The stock tube that comes from the fender panel seemed better art getting the air from the hole in the fender panel. it actually went in. The CAI has a rubber seal type piece that goes over the inlet on the housing. Once you install the bolts, it just presses up against the panel. Have no idea if this makes a big deal or not.
Also, lineup the intake tube kinda is a pain. You have install the mounting rod off the stock assembly to the new CAI so that the engine cover goes back on (it is for one of the screws). Takes some fiddling around with so that the tube is in the right place and the gaskets are on the throttle body and the housing correctly. Not as hard as #1 or #2 above, just needs some attention.
Impressions: Well, the truck has a different sound to it. It is not so much loud as it is a little throaty. Only at certain RPMS do I notice so far. There might be a wee bit of a drone at say 1500-1800 RPMS. When you get on it, it sounds pretty good. It reminds of my buddies SC thunderbird (minues the takeoff speed). The way it sucks in the air I guess. I have to say that there is a little more cabin noise than before. Not so much loud but not stock. I have yet to decided if I like it.
The biggest thing I have noticed is the ticking from the valves is louder now that the stock assembly is gone. When I put the engine cover back on, the left of my engine bay looked empty! The old housing is quite large and covers all valves on that side.
Performance: Well, I am not sure if this a placebo-type feeling I have or not but I feel a crisper response when stepping on the gas. Below 2k, I can't say yet if I feel that. Need more time to test. I can't say that I feel more power at all, but it does seem to shift better (AT) and it 'seemed' to get up to 80MPH much easier throught the rpm range. Again, more testing for me to fully decide.
Final thoughts: I am torn between liking the response I have now and not sure if I like the extra sound. With the radio on or driving on the highway it didn't seem that noticeable. But I was only on a quick cruise. A nice drive with the wife will be the tell-tale.
I am a bit surprised (well maybe I shouldn't be) about the build quality. I could see the filter adapter. It was off not that much. But the cover not fitting the assembly easily left me left in awe. At first I thought I had the wrong filter housing. But once it got in there it looked right except for that 1 screw. Dunno.
Anyways, jjust my recent experience, hope it helps someone.