i have a tip 2001 s4.
and my turbos are probably on the edge of moving on to a better place.
i dont want to run k04's... because... its an auto, and i dont really see the point.
plus im goin tobuy a manual or an RS6when i get out of school and can afford it.

but my friend mentioned you can get k03/k04 hybrids turbos,
[apparently a k03 housing and k04 internals?]
i already have a set of slightly used k03s in the garage waiting to be transplanted.

i havent owned an S4 for too long so dont call me out on this,
but will it give me more horsepower?.
and where can i get it rebuilt?
Is it possible to do it myself?.

every time i search i get BuehnEngineering.com
but everytime i go there it says it doesnt exsist?.

 

they dont exist. The ko4 has a 1-2mm longer turbine and ko3 housing. The ko3s has a nicer compressor wheel and larger turbo inlet. Just stick with the ko3s and call it a day

 

they do exist
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http://www.gpopshop.com/kkkturbos.html

 

You can have the turbine wheel swapped, but the 1mm isnt going to help much with a crappy 12blade compressor wheel. I would rather have a 8blade compressor wheel than a 1mm bigger turbine thats not going to help much