Okay, once again, straight pipes are just that, pipes right off the headers and out the back. No chambers, no mufflers, no cats, just STRAIGHT PIPES. Any muffler shop can do it. They can use the components you have and just replace every piece that is not just pipe with pipe, or bend you up a new system. But, only place to do that would be for total track only. Waaay too loud (and probably unplesant), and would only run well at high RPM all the time.from what company?