My very first Harley, bone stock. 04 heritage flstci. After reading, searching, and reading (may need reading some more) I'm still not sure what should I go with. I wanna get a little more umm on it, have a list of parts that I'll need but not so sure if I do it right. a) A set of slip-on V&H pipes b) A K&N air filter kit c) not sure which one PC or TFI ??????. I'm look for something that reliable, decent performance gain, don't have to do dyno and last but not least, keeping it classic/original look. Can I do mis-and-match thingy or do I have to stay with one Company?. Can any one give me a pro/con on the PC/TFI please. So sorry for repeated questions, choice is good but sometime too many choices out there give me dizzy and this old mind couldn't take it well without goes blanked .