and to

if you just fit the stage 1 filter, i.e. replacing the standard one you don't need to "remap" and anyway you didn't mention if you have a power commander or not, because without the DynoJet PCIII you can't remap.

And yes, removing the snorkle will help the air intake. all you have to do is adjust your CO settings following this link:

http://www.xt660.com/showthread.php?...=Co+adjustment