you can peice together a turbo kit for a ka at:

custom manifold: 300
t3/t4 turbo:500
hybrid development front mount:500
sr injectors: 150
ebay elbo n downpipe:150
cometic head gasket: 100
total
ECU tune: 500
total with NO build: 2200
less than a SR, and with a good tune on 7-10 lbs u will be kickin some ass.
*those prices arent exact, so you can come out cheaper or just a couple undred bucks more and still have a fun ka