I have straightshots hs on mine and I think they sound awesome. They are much deeper than the shortshots. They are plenty loud enough and u can fit them with quiet baffles if u want. I called Vance and Hines and the rep told me the short shots, cruzers, and straightshots hs all fit a phantom. My straightshots were listed for an Aero I believe on Dennis Kirk and then went on in about 15 min. If u have questions just call Vance and Hines and ask. The number is on their web address. No wait at all when u call and they r extremely helpful.