what would i need too bolt t3/t4 on my B5 A4 1.8t

first you need to deside on a certain t3/t4, there are tons of variants. 50trim with a .48 turbine for quick spool or .63 for more top end. 50trimis the bestt3t4 turbofor a 1.8t

Then you will need:
t3 manifold
downpipe
oil lines (feed and return)
injectors 440-630 (genisis are the best)
sw (revo, unitronics, giac)

That will get you running but you will then need a larger intercooler and other odds and ends.

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FACTS > followers
197whp and 292wtq with no chip on stock ic, airbox and catback
AEG crank +Scat rods + 83mm Wiseco pistons = CincyTT Version 2.0T

why is the t3/t4 turbo pretty cheap compared even to the ko4? i can find a t3/t4 for like $700. why is this, i thought they were pretty dam good turbos

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-Early '99 A4 1.8T Quattro Tip
-APR 91 -APR Boost Gauge -LLtek Cross Tower
-Evoms CAI -N75H -Stratmosphere Dv
-RS4 Grill -Techtonics Tuning Exhaust

Hold on baby Jesus, it's gonna get bumpy

theres really nothing to a t3/t4 unless its the smaller water and oil cooled. Its mainly a bigg A turbo housing, a basic oil fed center section, and a big A compressor. nothin Complex really.

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Its called old technology. Journal bearings have been around forever and ballbearings are amuch newer thing.

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FACTS > followers
197whp and 292wtq with no chip on stock ic, airbox and catback
AEG crank +Scat rods + 83mm Wiseco pistons = CincyTT Version 2.0T

actually some of the old svo's had bb turbos.

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Thanks to math and physics, all that old school guessing is taking out.
Doing math to select a turbo is very easy. Dont know why some people dont do it at all.
Anyways, NA418T, you will need to find a exaust manifold that would be able to conect to T3/4 turbo. You will probably will need to make a custum one. As for tuning, you probably will need a new fuel pump, bigger injectors, and a piggy back to go alone.

What are you planing the setup for? dayily driver? street racing? rally? etc....
How much power are you planing to produce?

History/EDIT:
The one of the first turboes where bb, thats true, then it made a move to journal bearings, and now its back. The production of ball bearings have improved over the years dramatically, so they can work better that journal bearinsg.