What are the differences between the K03 K03s and K04 turbos

thexav

Pro Tuner
Staff member
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407
Car
2002 Clio 172
The early 1.8T engines, and many subsequent engines have used similar turbos but I was wondering what are the differences between the K03 K03s and K04 turbo units.

Are they interchangable and what power figures are they good for?
 
KO3 turbo has 12 blades, and with the right supporting mods can release power around 200bhp, the
K03s has 8 blades, although lower than the KO3 the K03s will support around 220 to 250bhp.
K04 can flow to provide around 250-300bhp

The K04 is a larger turbo unit and came in 3 versions!

K04-020 no temp gauge aperture in the housing
K04-022 no temp gauge aperture in the housing
K04-023 with the temperature gauge aperture

When remapped you should see an easy 250bhp on the stock 1.8T and with other mods the K04 can flow to provide around 300bhp.

Read more at: https://www.torquecars.com/audi/18t-tuning.php
 
No worries, I just happend to be working in the Audi section as you posted your question, so it was a quick cut and paste job.
 

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