where do you buy a snorkel? and how much do they cost?
what is the biggest tire you can put on a foreman without a lift.(with out rubbing).

are there any other cheap mods that improve performance?

 

Triangle ATV is the ONLY place you can buy them right now (they aren't really a ompany though, just a ATV group that decided to start selling snorkles) Link: http://www.triangleatv.com/

They are charging 109 bucks per snorkel though...you can make one for $20 or less.

Not exactly sure on the tires. Check out www.highlifter.com for mud riding stuff. Can get lots of help on the forum too.

 

You can fit 27x9 front and 27x12 rear on stock rims and suspension with zero clearance issues. I have these in blackwater XT's on my 450 and they are great.