I'm putting together parts to bolt this T25 onto my 420a.

There are 3 tubes coming off the turbo that look like oil feed/return lines. One is slightly larger (assuming this is the oil feed) and goes to a square shaped "nob" if you will, then feeds into the turbo. The other just goes straight into the turbo. Which one do i hook the oil feed to, and which i hook the oil return to, if either? (Picture 1 - tall and short tubes in top left and the black tube in the bottom right)

I'm assuming this is an O2 sensor on the part that connects to the downpipe. Do i put MY O2 sensor here or should i weld it shut and mount my sensor elsewhere? Will using my O2sensor not throw a CEL due to a LOT more air than is normal? (Picture 2 - wires on right)

Where do the silicone hoses coming off the wastegate go to? (Picture 3 - 90 degree silicone hose at top, and silicone hose just below the wastegate with the red nipple)

What is the nipple on the turbo outlet (to the IC)? (Picture 1 - Top right of the turbo)

<a href="http://www.putfile.com/pic.php?img=3339769" target="_blank"><img src="http://img1.putfile.com/thumb/9/24913350649.jpg" alt="Click to enlarge."></a>
<a href="http://www.putfile.com/pic.php?img=3339768" target="_blank"><img src="http://img1.putfile.com/thumb/9/24913350662.jpg" alt="Click to enlarge."></a>
<a href="http://www.putfile.com/pic.php?img=3339767" target="_blank"><img src="http://img1.putfile.com/thumb/9/24913350678.jpg" alt="Click to enlarge."></a>

Nipple on outlet is for wastegate source- the wastegate hoses normally are T-ed off to the BCS and the nipple on the outlet.

The black tube big one is the oil return line.
And yes, that is the o2 sensor on the o2 housing.

What I find weird is where did you get this turbo because it doesn't look like a 2g T25.

It fires upward whereas mine is downward firing and has an elbow pointing to the SMIC

looks like a t25 from a s13 ca18det

The pipe that exits to the downpipe may be bolted on upside down. Its been off before. Would it look the same as a 2g t25 if it were on the other way around?

And its definately from a Mitsu because Mitsubishi is stamped on the side of the turbo. Does TE04H mean anything to you?

I'm rather new to the turbo scene so sorry for my lack of knowledge. I'm trying!

Edit: I did a search for TE04H on google and didn't see a whole lot, but I did see someone say something about the turbos from an eclipse AT and an eclipse MT are different. Seems strange to me, but its what i read.

I isn't the same. The place where the wastegate bolts to the compressor housing is different, and the outlet on the compressor housing is different. Those coolant and oil feed lines also look like they are in a completely different orientation.
This turbo did not come from a factory 2g dsm.

Hmmm...strange . Here's a pic of the side of the blower housing. If anybody knows its origin I'd like to know. Maybe its an extreamly rare Mitsubishi turbo capible of un-godly power

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Google is your friend: Here are some possibilities from http://www.gamesbbs.com/~turbosi/junkyard_turbo_list.html
CHRYSLER LeBaron 89-92 2.5L MHI TE04H
CHRYSLER LeBaron 88 2.5L MHI TE04H
CHRYSLER New Yorker 88 2.5L MHI TE04H
CHRYSLER Town & Country 88 2.2L MHI TE04H
DODGE 600 88 2.5L MHI TE04H
DODGE Aries 88 2.2L MHI TE04H
DODGE Caravan 89-90 2.5L MHI TE04H
DODGE Daytona 89-92 2.5L MHI TE04H
DODGE Daytona Shelby 88 2.2L MHI TE04H
DODGE Lancer 89 2.5L MHI TE04H
DODGE Lancer 88 2.5L MHI TE04H
DODGE Shadow 89-92 2.5L MHI TE04H
DODGE Shadow 88 2.5L MHI TE04H
DODGE Spirit 89-92 2.5L MHI TE04H
PLYMOUTH Acclaim 89-92 2.5L MHI TE04H
PLYMOUTH Caravelle 88 2.5L MHI TE04H
PLYMOUTH Sundance 89-92 2.5L MHI TE04H
PLYMOUTH Sundance 88 2.5L MHI TE04H
PLYMOUTH Voyager 89-90 2.5L MHI TE04H

EDIT: the winner is....via: http://www.mwfi.com/Turbopage.htm a 1988-1990 Dodge 2.2L engines Turbo I found this by googling the "4448992" number on the compressor housing. It also matches up with the TE04H number.

Is this turbo still considered a T25 though? Or what should I call it?

http://www.thedodgegarage.com/turbo_turbo.html#1988

this is what I found