Got the Superchip and Airforce 1 the other day. Thanks Mike. I put those two items on last night; test fired it, started just fine. Disconnected the battery again and took the exhaust off in anticipation that the Gibson Single Side Swept will arrive today. I will probably take it for that 20 mile drive today sometime if UPS would just get here!! The ole 5.4L sounded pretty good with the exhaust off!! I will post back and let everybody know how it turned out.

On another note, I might take a pic with the digital camera and show everybody the Y connector on the exhaust. I don't know if it is like this on the F150's but on my 2001 Exby the Y is just before where you disconnect to put the Cat back system on. Well I can look and feel up there real good and see that it is a very smooth connection, wide open and probably keeps the full diameter of the pipe from that left side of the engine. Good angle for siphoning also. Saw all the post on the Y connector and thought I would let you know. I could not see how you could get any improvement redoing this area.

 

Gibson screwed me good. They did not include one of the pipes in the kit. I am so pissed off right now. Took my exhaust off and a 20 minute operation after UPS came is going to turn into a f#$king week. Meanwhile, I don't have a vehicle to drive.

 

Sorry to hear about the Gibson mix up.

I am interested in what you do with the y connector. No one has posted a y replacement on a Expy, that I have seen.

I have a 5.4L Expy 4X4 and am considering the y connector replacement.

My exhaust is a Borla cat back and I have Gibson shorty headers. So the Y will need to be reduced down on mine to 2 1\2 to match up with the Bola exhaust( the y connectors at Summit and Jegs all exit with 3in pipe). Looks like it will be a job for a good muffler shop.

 

Look at the other "Y" threads guys. It's what you can't see, that is bad.

 

Got it all together today. Gibson called Four Wheel parts in Dallas and I went down there and took the missing pipe out of one of there boxes and Gibson will replace their's. It runs great. I took it out and did 30 miles of driving and it almost performs like one of my BMW's!!!!. You know it runs better when the front end comes up pretty good when it shifts from 1st to 2nd!! As for the Y pipe I could see mine totally and feel up inside. It was smooth as can be. I have read all the post about the Y connector and I have seen the Y connector on other trucks. You cannot see it like you can on an expy once you remove the muffler (it is right there at the muffler connection). Mine was clean, clear and smooth with full diameter from that left side of the engine. Did not take any pics but here is a site about the modz plus I put a temp sensor on the FIPK intake to see what the underhood temps were. Runs great thanks again, Mike.

http://dfwbmw.0catch.com/ExpyModz/

http://dfwbmw.0catch.com/IntakeTmp/

 

Also let me explain that IntakeTmp test pics that I put up on the url below. I saw people kind of bashing the FIPK saying in hot weather they are a dog. I put a temp sensor on the filter of my Airforce 1 FIPK and messured the air with a digital read out inside the truck. What I found was at about 96 degrees outside was that if the truck was moving, as low at 30mph the temp went down to only about 2 to 10 degrees above the outside temp. If you stopped for about a minute or so without AC on it went up to about 120. If you stopped for over 5 minutes idling, it went up to 140 degrees. If you went longer with the AC on the intake air was as high as 146 degrees. Now I did not test the old system in the same situation so I really don't have nothing to compare, plus I have not own the vehicle long enough to have the loss of power in over 100 degree days. We have two other cars and the expy really is not a daily driver for us. I think the bottom line is that these trucks are not going to have a lot of power when your in stop and go traffic, AC on high, with a FIPK or Stock intake. So I will take the performance when it is moving and just suck it up for the few times it bogs with 100 degrees days.

http://dfwbmw.0catch.com/IntakeTmp/