Where can I get this? Ive already searched and I couldnt find it. Also where can I get a 55-57 mm throttle body? I just dont know any good Eclipse websites.

You can get the UDP and the bigger TB from www.howellautomotive.com
goodluck.

You can also get the UDP from www.Ptuning.com and use your 2GNT discount if you link to it from here, later.

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04' EVO VIII Tarmac Black
99' GS OZ Ed.- Sold

if u use the write up I have a trick that stops the crank from spinning. Nope it is not using a screw driver. I just removed a spark plug and took about 3.5 feet of nylon rope. I put about 2 feet in the hole the plug came out of. This stops the piston from going up all the way and so the crank wont turn and u have 2 hands again. ONLY USE NYLON ROPE, if u use any other kind it will leave fibers on the piston, this could be bad. Nylon will not leave anything behind when u back off crank pulley and pull out rope.

or just use an impact wrench.

dsm/mitsubishi service manuals https://www.mediafire.com/folder/5k14qlaulb9s1/dsm_mitsubishi

service manuals(my whole collection) https://www.mediafire.com/folder/ac51jwwa3g1n1/automotive_manuals

update: I inquired yesterday as to where the UDP I ordered two weeks ago from Howell that was "in stock" at the time and "should be there by Friday" was and they said it'll be another 1-2 weeks... They are back ordered. If you're looking for one, I think there's a couple in the FS/WTB forum.