yes, any mods to the engine will void warranty, but if u ever have any work done just take it off and ur good to go..the diff between sri (short ram intake) and cai (cold air intake) is sri the cone is shown on top, usually cai gives you a TAD bit more hp/torque but barely noticeable really.. if it rains a lot and streets are flooded, go with sri or cai but with a bypass valve (aem sells em)... cai is great for cold cause the colder the air, well the better and more gain you'll get... i got sri in my honda and a cai in my sebring