I have a 2014 road star s xv1700as. I have cobra speedster longs, no baffles. Was going to change the air filter to a OEM style K&N filter. I've heard from people I need a tuner and I've heard from several others that it's just a waste of money and not to do it. Not sure what to do. I'm also under warranty and don't want to void that in any way. Thanks all, any info is much appreciated!