Mash up of exhaust questions
So to start I am in college and between jobs so looking for some temporary ideas until I get another job to do stuff right. I also do not want to void my warranty just yet(2012 GT with 26k miles). First off I hate how quiet our exhaust is stock, so what are some things I could do on the cheap to get a bit closer to that bad *** rumble our cars should have? I plan on going with pypes offroad hpipe and probably their catback system or some sort of axel backs. Also I saw on a post here that offroad hpipes would require a tune, is this true? -- and you can not tune then untune without dealer knowing correct?
My friend works at a ford dealer and heard(didn't work on it) a GT that sounded mean and it appeared to have no exhaust from somewhere before the mufflers. When I took my mufflers off the exhaust banged around like no other just from moving the car an inch so I put them back on. Is there any way I can take more piping off like my friend experienced and not have banging of the exhaust? I'll probably have more questions arise but this is where I'll end it for now, thank you for your time in advance.