Hey guys i was just wondering why all of you guys buy these like $500 exhaust systems when I get mine from this shop called speedway muffler, and they have all the mufflers: greddy, borla, magnaflow, etc. And they have the piping and customize it to your vehicle, so I dont see the difference i mean the piping is just pipe, but they use watever muffler you want and they do it for like $200, so my question is why dont more people do this?