I guess you didn't state what year she is driving. First off MRT V2.0 would be my choice also as I love mine. Now, you didn't mention what year, 2010-2011 you could add headers but I can't tell you what the added sound would be. Okay with that said, 2012 LFX engine you can't add headers since they are integrated into the head but you can swap out the catalytic converters for Solo's HFC's. For me it was a hard decision because of cost but I did add them and still have seconds thoughts on the cost of them. But, they do add a slightly deeper tone at idle and a more aggressive sound when you are hard on the throttle. I would start with the V2.0's first and if money is no object and she wants a more aggressive sound then headers or HFC's. JMO.