Power commander and slip on

I was just wandering if it is required to install a power commander when just doing a slip on system. Also has anyone heard a yoshi slip on system. Seen them on ebay for decent price. Thanks

Heres a sound clip http://www.r1-forum.com/forums/showthread.php?t=262007 And I don't believe it's necessary to have a PC for just a slip on

Thanks just what I was looking for!

A power commanader is not necessary for a slip on, if you were going the full system then yes, i would consider it

How about a y-Pipe and slip on?

To add to the previous question...what about adding V-stacks with a slip on?