I am not sure what companies make exhaust systems for your car, I looked around and couldent find much. I would do like someone else said and go to an exhaust shop to get a custom bent system. As far as the dumps go, you dont have to open them on the streets, but I know how parents can be, on my first hot rod, my dad and I had talked my mom into loaning me the money for a motor, it was a stock headed 9.5:1 355 with a stock bottom end and 330 hp. She said yes, and we told the builder to get started. My mom went to work and someone there told her that since the motor was balanced that meant it was a racing motor. She said that because of that she wasent going to pay for it and we had to tell the builder who had the motor half built that we couldent pay for it.