ok here is a link from NICO that show a 3 inch on a ka will give you close to 10 hp.
http://www.nicoclub.com/zerothread?id=101792
look about 3 post away from the end on the first page.
thats is a huge improvement
see flavio you need an exhaust
:finga:
I know i need an exhaust. I think on dyno day we should do some investigating
1 run with a stock exhaust
1 run with no exhaust
1 run with 3 inch cat back
3" is too big
http://www.nissanperformancemag.com/november02/ask_sarah/
Q&A third from the bottom
If you are talking about the two dyno charts, it says dyno2 is the same as dyno1 except for more advance and no cat. Stock exhaust was used for both according to the title on dyno1 :huh