I just ordered a Sig Somthin Extra kit and was wondering what
you would recomend for power?

I have a YS45 that I was thinking of using, however it likes a
tuned pipe. Would the pipe fit under the fusalage if I turn the
motor 100 degrees or so?

I have also been think about saving the YS for a speed plane
and purchasing a new engine for the SE.

If I went with a new engine what would be the best engine for
this plane?

Thank you for the help.