you will get a little better air flow, so i'd double check your jetting w/a plug chop. also, without the snorkel, it's a lot more likely to have crap get into your air box. i had 10x the dirt, bugs, and shit from weeds etc. and that's no good with a stock pos filter. i put a piece of fine window screen over the end of the lid to keep it all out and it worked great. also had 12 uni filters in the lid. but that gave me a taste of the power gains from increased air flow. so i ditched the lid, (using a pro design adaptor/filters), rejetted, and never looked back.